Not sure what the "proper" phrase is for all the sentence-ending idiosyncrasies. Maybe "verbal tic" would be better?
Wait a minute -kuma! How come you don't have a verbal tic -kuma!?I'm Kiso.I'll show you the best victory!Kuma-class 1st cruiserKuma-class 5th cruiserThat's right -nya!Little sisters should do whatever their big sisters tell them to do -nya!Huh? Eh? Catchphrase ending??Kuma-class 2nd cruiser