Talk:I-19/@comment-3269218-20140318071705

Personally, I'd say the "ザブーンっ" from her marriage line is just Iku using an onomatopoeia, words that represent sounds, which is common in Japanese. It's also fairly childish, as is fitting for Iku's personality.

On the other hand, my knowledge of Japanese onomatopoeia isn't great, so I can't say this with certainty.