Look at these lil fellas :3

Tsarcat, Base form

ferocious, will try to chase and explode at the player, suicide bombing. These are the juveniles, and have not yet realized how dangerous exploding is.

Atomicat, Evolved form

Timid, will avoid the player, occasionally scratching and constantly avoids them, only exploding on persistent players. As adults they’ve realized how dangerous exploding is, and avoid people out of fear for their lives.