User blog comment:Yapby/All Unreleased Contents (Units, Quests, Raids)/@comment-71.232.207.27-20150705210747/@comment-173.56.73.18-20150705235824

Karl has a pretty unique leader skill, but obviously isn't as useful as Raaga or Rosetta for BB spamming. He and Seria have that Selfish SBB which is nice. Seria has a nice one as well, boosting everyone's stats to an extent, but not evenclose to Grah. Paris and Lugina are pretty situational inm my opinion, if you were to plan to use them at all.