onomatopoeia - What does バタバタ mean?

What does バタバタ mean?

コラム書かなきゃ。映像チェックしなきゃ。アレも書かなきゃ。アレも考えなきゃ。バタバタバタ子さん(´･_･`)

Everything make sense to me except for the last part.

Answer

バタバタ is an onomatopoeia expressing busyness. Usually, a Japanese onomatopoeia repeats a two-mora part (like バタ) twice, four morae in total, but here, it is repeated thrice.