Thread:Linathan/@comment-5714316-20151019011844/@comment-26140304-20151019212658

Yes, passives are active even when they are not leaders. The leader position is really only used for helping other friends out.

Though, passives don't work when arcana are in the sub-party, unless their description says so. Take Juliana for example: She provides an Atk and Def buff when she's in the sub-party.