"Hotel Del Luna" - Jang Man Wol.

Kkokdu!! Nah. Only joking.

I'm gonna have to go with a bit of a deep cut, because I decided to insist that I had to adore the character from the beginning to the end of the drama. Due to the nature of this drama, though, I'm going to need to be a little obtuse.

My choice is Kang Yeo-rin from Mystic Pop-up Bar. As half of the younger OTP in this drama--she kicks ass, literally and figuratively, throughout the show. I loved her from the moment she appeared...and all the way through the end. Gah! What a fight scene!

Alternate choice (with less spoiler potential) from that same drama: Yeomradaewang, leader (goddess!!! icon!!!) of the underworld (played to the hilt by Yum Hye-ran). She sure chewed up that scenery!!

The Goblin!

He had a tragic past. Became super rich. Had nice powers. Great wardrobe.

Shin Min Ah's gumiho character "Gu Mi Ho" from "My girlfriend is a gumiho". She was so cute and a delight to watch. The story was coherent, the OTP romance sweet, and makes for good light watch even today (trust me because I only watched it recently for the first time)

Woori the cat from Because This Life Is Our First. Beautiful, affectionate, and housebroken - even most MLs are 2 out of 3 at best.

Hye Sun SAVED gumiho rommie for me. She was awesome. I finished the show for her story line only.

But my favorite non-human characters are the cells from Yu Mi's Cells. They're so relatable, hahaha. And super fun!

My favorite non-human character is Holo, who happens to be one of my favorite ML's in K-dramaland too. He is an hologram but he evolves to develop human feelings. He is nice, he is cool, he is gentle, he is caring, he is charming, he can sacrifice for others...

But there is a tie for the first place! Because I have to add Seon Woo-hyul, our charming vampire from Heartbeat 💔.

Honorable mention: Nam Shim (Are you human too?) and Monkey King (Hwayugi).

Lee Soo-hyuk from Scholar Who Walks the Night because I want to be that menacingly sexy and up my eyeliner game. Lol jk but not really.

Although I briefly considered the turtle in Alchemy of Souls (far superior to the turtle in this year's My Lovely Liar) I think I have to go with the evil spirit that possessed Kim Tae-ri in Revenant. Complex back story for an evil spirit, and (mainly) because she possessed Kim Tae-ri!

My first choice is a bit spoilery, so I'm going with the robot in I'm Not a Robot

Part of me wants to say Van from Island, just because of Kim Nam-gil, and there will always be a part of me that loves each of the Bulgasals for different reasons (Eul-tae is such a good pick, @solstices !) but it's probably actually Lee Rang from TOT9T and TOT9T38 for me. I love Yeon too, and all the other non-humans that they are introducing in 1938 (which I just started this week) are great, but there is something about Rang. When his character was introduced in the second season they did the little freeze-frame and it said "Likes: Lee Yeon. Dislikes: Lee Yeon." and I laughed so hard. So so true. I love the fraught brother relationship, the love for animals, the hatchet-throwing, and how he always ends up taking care of things and accidentally letting his inner softie show. Pretty jazzed about his budding romance storyline in 1938 so far!

I'm tempted to answer Eugene... but that's spoilery.

So, I'm choosing Choi Jin Hyuk as zombie Kim Moo Young. A zombie refusing his zombitude, training until he regains his dexterity and trying to solve crimes.
Who am I kidding? It's Choi Jin Hyuk voice-over that seals the deal.

I fell in love with Choi Jin Hyuk, his mane of glory and gorgeous voice in "Gu Family Book." I'm unsure if I finished it, but whenever I see him or his name come up, it takes me back to Wol Ryung.

Magic Horse, don't remember his name from season 1 Arthdal Chronicles.

My original answer before realizing this could include non-animals was Mandu from Ghost Doctor. I spent so many episodes worrying about his welfare!

Because the ones I would have chosen have all been taken I am going for two unusual ones that I know no one else would choose.

Two cats because they perfectly demonstrated the multiple personalities of cats:
The cat from The man’s voice webdrama.
The cat/man from Meow the secret boy.

The first character that came to mind was Choi Kang Chi from Gu Family Book. He was so sincere. When he figured out how to make the flower sprout, he had this childlike quality I found really endearing. But the poor guy also went through alot of painful and lonely times.

After thinking on other shows, I remembered Heartbeat but I didn't even remember the character's name until I saw other people mention. I did like his character so I guess he would be my 2nd choice/honorable mention.

My top pick is LEE YEON from Tale of the Nine Tailed. It must be great to have loads of money, powers and snark. I also learned to like mint choco, but it has to be the right mix.

I also like Goblin, Grim Reaper and Samsin Halmeoni from Goblin.

Honorable Mention: BUJA from Korean Odyssey. I like zombie girl but I didnt get to finish the series so I am not sure what happened to her.

Not human anymore counts, right? In which case — Arang from “Arang and the Magistrate,” with honorable mention to the delightful trio of helpers from “Showtime.”

Also, if only the “Hotel Blue Moon” trailer at the end of “Hotel Del Luna” weren’t just a tease, the character played by Kim Soo Hyun might vault to the top of the list.

I guess I love non-human characters as a whole! I love most of these mentioned, and some more!

Some others that I thought of naming are spoilers 😂 This is a funny prompt.

The only other one I can think of right now is the campus ghost in What's Up!

I will pick the Coffee Ghost from Masters´ Sun bc thats prob my future, begging coffee from humans.
only bc Rang is half human

Mountain God Ryu Hong-joo : TOT9T 1938.
And the reason is obvious : her entry into the story. Immediately she got introduced I knew she was moving up the charts. Add in Kim So-yeon playing her character with such finesse, there's nothing to not like. She was the glue they held the trio mountain god friends together - Yeon, herself and Cheon-myung, and the reason why I was still trying to accept Cheon-myung's antics - she understood what he felt deeply.

Honorable Mentions...
Lee Rang : TOT9T 1938.
Han Ji-pyeong's hologram, voiced by Yeo Jin-gu : Start Up.
J(Amy)e : Love In Contract.

Ok, for all the horse lovers here, what about the talking horse in Wok of Love. Such an unexpected and whimsical character. I wish he had more scenes.

For me, it has to be Shim Chung from Legend of the Blue Sea. She was just so endearing and loyal. I loved watching her adjust to life on land. Such a great performance by Jun Ji Hyun.

LMK’s cat in BTIOFL

Just one?

My favorite 9-tailed fox, Gu Mi-Ho is Shin Min-Ah (My Girlfriend is a Gumiho). But, does this count: Park Bo-Young as Strong Woman Bo Dong-Soon?

My favorite ghost Yoo Jin-Oh, is Go Pyung-Pyo (Chicago Typewriter). But, does this count: Lee Jong-Suk as comic book hero Kang Chul?

My favorite wizard Jang Uk is Lee Jae-Wook (Alchemy of Souls 1), and my favorite alien Do Min-Joon, is Kim Soo-Hyun (My Love from the Star).

Lee Rang from TOTNT.

Even though I disliked the drama (the spin-off was 10x better) I loved Kim Bum's portrayal as Rang.

Bonus points: he was so hot

Son, O-gong from A Korean Odyssey. He didn't change very much--as the Monkey King he never had patience for humans, except for the female lead. I loved how he made no effort to conform to our norms--never pretended to care about us humans. At first, he only liked the female lead because of the magical bracelet, Geumganggo, he couldn't remove from his wrist. LOVED this character.

Gong Yoo -Goblin.
Seriously though, it's just cruel limiting it to 1 because you can't talk about Goblin with out mentioning Reaper- Lee Dong Wook and then when you think of LDW, TOT9T1938 comes to mind with his fabulous character Yeon but then you also have the dilemma -how can you exclude Rang aka Kim Bum? You can't because they are all tied together through 6 degrees of seperation.

Under the theory that the first thing that pops into your head is the 'correct' answer, I've got to say the cat in 'Meow The Secret Boy' Welcome).

Zombie Detective!

Lee Rang from Tale of Nine Tailed. A complex character who turned a little evil after getting abandoned by his brother and only family. I felt for him and got mad at Lee Yeon at times for being harsh at him. Our boy didn't shy away or pretend he wasn't hurt by his brother abandoning him. And I cried my heart out at the ending of season 1 and got annoyed that the future can't be changed. Still, he got his cute mermaid partner this time.

Shin-yu the Dog from Destined with You. I have a lot of (mostly giffed) arguments on my wall as to why he is obviously a dog, and to that I should really ad him obeying the "paw!" command, and also him staring out the window of a vehicle, like a sad dog.
Shin-yu the Dog is presently my favourite, and any day is for him a good day to be a dog. Also, after ten years with him the most challenging part of the Spell of Fortune is fulfilled so that we can hope and expect for Hong-jo to perform that spell and get even richer and luckier.

I would like to remind everyone of the virgin ghost in Oh my Ghostess by Kim Seul Gi.

Never watched the musical but I pick Dracula Shin Sung Rok 😆

https://www.dramabeans.com/members/katakwasabi/activity/1475554/

God inhabiting Deok-hwa in Goblin was a mic glass drop perfection.

Amy the cat in Love In Contract.

Because what is a God without a cat!!

Having only scanned all the wonderful comments I failed to see any mention of Maximus, the Eternal Horse in the otherwise forgettable TKEM. He had more on screen presence than the human who rode him.
Someone already mentioned the wonderful hat-wearing horse in Wok of Love whose absence in the last half of the drama made it substantially less enjoyable.

I love titular girl (and boy, but that's a huge spoiler, so shhh!) in ARANG AND THE MAGISTRATE, but it was YSH's Jade Emperor and his flowery goat that completely won me over there. Every scene with them (plus poor, eternally trolled King of Hell) was pure gold. Technically that would make two characters, but once you see the drama and understand WHAT that goat essentially was... yeah, still counts. And to this very day I envy Jade's hair stylist, best xianxia hair I've ever seen in a kdrama lol.

I can't pick one! Here is my list:
My favorite has to be the mermaid from "Legend of the blue sea"! She's beautiful, naive, smart, and a dork all in one.
I agree on the gumiho girl from "My roommate is a gumiho". She is adorable!
The vampire from "Arang and the magistrate" ONLY because it's Lee So Hyuk who is mostly bare chested and had a longish hairstyle. And the ghost girl, Shin Min Ah, who is the most adorable feisty ghost ever!
And the Cells from "Yumi's cells" because COME ON. hilarious! Especially the GIANT hunger cell! I can soooo relate LOL
From "Sweet Home" - I love Song Park as a monster with sharp black blade-wings. Also PROTEIN!man.
From "Tomorrow" - the main reaper trio is BOMB.

AND HOLO! I think he's an all-around favorite!

I want to pick Lee Rang (Kim Bum) from Tale of the Nine Tailed, but I'm afraid that I'm not qualified because I only watched 1938 and not the first season, so I'll pick our Shinnamon Roll Nam Shin III (Seo Kang-joon) from Are You Human Too? who was the perfect robot boyfriend.

As all of my other favourites have already been mentioned:

Kim Dan of "Angel's last mission: Love", who goes full out for his (impeccably dressed) love interest.

An honorable mention to his "boss" Arcangel Hoo, who later turned into the inimitable Cat Man in Heartbeat.