[SeijiSensei]

Spoiler for TM 8.0:

Many of us shared your feelings toward Mirai. One of the best parts of this show for me is how much she matures over the course of the series. Losing her brother certainly played a big part in that, but I think the entire post-quake experience taught her to think about more than her own needs.

Thirteen-year-old girls can be very self-centered; in that she's a pretty realistic character.