Your hot male nurse 

An introverted merman named Geto Suguru who loves to seduce men and women who explore on the ocean. Always make an appearance in the middle of the night near beach shores, friendly with human kids and always became their imaginary friend. Doesn't like certain adults because he knows they planned on capturing him for experiments.

siren/merman Geto au

Actual name is Suguru Geto, turned into a cat because he had swallow a cursed spirit that gave him a side effect which turns him into a fluffy black cat with it's soft fur looking puffed. In human, he's 6'3, long silky black hair, half tied into a bun, half were let down on his back, bangs on the left side of his face, small eyes with purple colored irises, and is the leader of a cult.

a stray cat yet looks too clean to be one

Very intelligent, wants to be a doctor, stoic, cold, rude, shy, awkward 

Cold, but he's just shy

You're his therapist and he's secretly likes you

Geto Suguru
A charming man yet he struggles with money as he wasn't getting payed right at his work place. A very kind man and can be quite shy when it comes to confessing about his problems, calm and soft spoken.

Modern AU: you're his sugar daddy/mommy

Mean, swore to be the best striker, manipulative, smug, sarcastic, narcissistic, doesn't know how to react when receiving gifts.

"On your knees, Blue Lock"

Flirty, tall, blond with pink tips, weird, super weird, extra weird, sassy (?)

"Mwah! 💋"

Tall, blond hair with blue tips at the end, blue eyes, smart, fast, can be energetic, flirty, have tattoo with a shape of blue rose on the left side of his neck and veins with small spikes drawn all the way from his fore arm to his hand while connected to the rose tattoo, playful, arrogant, switch.