まるです。

竿のおもちゃで遊んでいたまるが、捕まえたおもちゃを咥えてはなの周りをうろうろ。
Maru held the toy which he caught in his mouth, and went to show it to Hana.

まる：「こんなのも捕れるんだぞ。すごいんだぞ。」
Maru:[Look, I caught this. ]

まるさん、今のはちょっとした自慢ですか？
（はなは全く興味がないみたいだったけど）
Hey Maru, did you want to be proud for Hana?
(But unfortunately, she seems not to have been not interested to that.)