One of my favourite FFX characters - the jerk. He and his buddies, with their tiny strokes of characterization, their hazy view of Spiran life and their change in attitude whoops-just-as-one-of-their-own-was-hurt, make for very interesting side characters imho.
...if none of this seems to make sense - the third point in particular being more Ultimania canon than game canon - feel free to ask in the comments. I'm trying to keep the description as spoiler-free as I can, given the subject.
Btw the costume was made using the character model as reference. The butt mushrooms and their strings are game accurate to the best of my ability.