FUcK, Unsigned took Kaoru from me.... BASTARD, I will have her, and I will fight you for her! And by God I will smite you and anyone who gets in my way! I am 20th level Fighter (3.5 role set)!
I don't see the need to "claim" a character if you like it. My opinion is that you just say you have him/her as your waifu/husbando, and that's it, if someone else says the same, good for them, another fan.