まるです。

「虫を見つけましたよ！」
Maru:[I found a bug!]
と喜んだのもつかの間。

慌てて立ち上がったために紐が体に絡み（直前まで竿のおもちゃで遊んでいたため）
それに気を取られてあっという間に見失う。
However, because Maru was preoccupied with the string which got entangled in his body,
he has lost sight of it in no time.
(The string is a thing of the toys of the poles. We had played with it.)

「あーあ、この辺にいたんだけどな。。」
Maru:[Where has my bug gone to?]
いじけて、いつまでも何もない床をちょいちょい。
Maru sulked. And he touched persistently on the floor that there was nothing.