Name an anime/manga character who's a designated hero: link

I say Leena Toros as to quote the Scrappy Page for Anime: link
"She attacks Bit for the slightest infraction, from breaking his back for setting her up on a rendez-vous amoureux, date with Harry to attacking Bit with her Zoid for accidentally walking in on her in the shower, and attacking her own teammates so that she is the sole winner of the fight."