Rin about to unload on Maruta.

Maruta is an unplayable character debuting in the latest game in the series, Goketsuji Ichizoku Matsuri Senzo Kuyou. It seems to be taking the role of that of a dummy in the game's training mode bonus game. It appears as a wooden straw dummy with a bullseye painted on it in the middle.

Its name means "log" in Japanese, which more or less fits the character.