Board Thread:Questions and Answers/@comment-24702213-20140513014703/@comment-25090105-20150130162529

Just to clarify, it's the Leader Skill that affects the extra powers you gain from your own leader, or from the friend you select for the Live Show.

Generally, the higher the rarity, the more powerful the leader skill (R increases power by a small amount; SR = medium amount; UR = large amount). However, as far as I know, it only applies to scouted members. "Free" event members with UR rarity (e.g. Kotori snowman) may not have the usual URs' Leader Skill (i.e. Only increases power by a small amount instead of the usual large amount).