Your top kin or number one kin is the character you kin the most out of all the characters you kin.
Person #1: Okay I already asked you who you kin from MHA, but who's your overall Top Kin?
Person #2: My number one kin? ....Probably Dazai Osamu from Bungo Stray Dogs
Person #1: .....A-are you okay?
Heavily relating to a fictional character to the point where you feel kinship with them.
The word has also evolved to be used with specific situations, specific things, real people, animals, songs, OC's, ect,
Person #1: Who's your top kin?
Person #2: Hmm.... I'd say Kirishima Eijiro
Person #1: Omg no waaay! I kin Ashido Mina!
--------------------------------------------------------------
Person #1: Dude. My cat is like the worst! He's always knocking things off of counters and never stops moving!
Person #2: Lol. I kin your cat. I am your cat and your cat is me.
Being someone who heavily relates a fictional character to the point where you feel kinship with them.
Person #1: What characters do you Kin?
Person #2: Omg, I'm such an Oikawa Kinnie