A character in the game called "Shi" dislikes "Kikky". That is because "Shi" doesn't like vermin. (Maybe thinks Kikky is a bacterium)
Also, for in-game setting purposes, "Kikky" could be thought of as just the cats from the Mike minigames (the Mikes must take care of them when not in use) (?)
I bought her the same cheap toy like 8 times and every time she instantly loses it and then starts yelling because she doesn't know where it is. Makes me wonder if she would have been happier if she never knew that Toy existed in the first place...