User blog comment:8purplehorses/what's your favorite adventure time character and why?/@comment-5111235-20120921131546

I would have to say Marceline. Reasons:

1) Immortal.

2) She can shape-shift (best power ever).

3) Can fly.

4) Long, probably complex backstory that we have only seen a small portion of.

5) Musical.

6) Tough, both physically and personality wise.