One of the X-Men's oldest foes, the opportunistic Mesmero is always looking to validate his ego. Not necessarily a criminal at heart, Mesmero is willing to work legally so long as he's comfortable. However, he also has a vicious streak when defied, and will nurse murderous grudges against those he sees as enemies. Krakoa seems like an ideal environment to "reform" Mesmero... as long as he's satisfied and can keep his darker impulses in check.
Huh. The only Mesmero story I ever read was the CXM/UXM issue where he turn the X-Men into circus performers. I always thought he was a much more established villain by that time. From this spotlight, I learned it was only his third appearance.
Conversely, I had no idea he had ever come back. I always assumed he might have made an appearance as a one-off villain in a b-title here and there, I had no idea he had so many more X-Men appearances.