User blog comment:Mohamed7845/The Upcoming 7*s Michele/Melchio/Sargavel/@comment-26455864-20150903201617

Honestly, for me, Sagavehl is the worst out of the three, only because he offers the least. Melchio offers status negation and removal (same as Sagavehl) along with a light element buff and an ATK -> DEF buff, which is useful. While Sagavehl does offer 10% more HP on its BB, this adds with spheres and LS, and isn't too big (800-900 I think). The 30% BB fill rate is also good, but others offer this as well (Bestie comes to mind as she has a very good LS, which means she'll probably be used more often).

Michele is good for offensive teams with her massive ATK buff, crit buff, and fire and dark element buffs, and so she can't really be compared to the other two, who are both status removers/negaters.