Basically for the non FLB'able Labyrinth weapons, they have brand new skills that give an effect depending on which slot a Kamihime is in.

Arrange: Grants specific effects to party members at the start of battle. (Effects are set on a Special Frame unless otherwise noted.)
<Zeal>: Grants Zeal (+10 Burst Gauge, -10% Max HP) to the Kamihime in position 3 of the party formation (4 Turns).
<Regen>: Grants Regen (+200 HP) to the Kamihime in position 4 of the party formation (10 Turns).
<GTA>: Grants Guaranteed Triple Attack to the Kamihime in Position 3 of the party formation (1 Turn).
<Barrier>: Grants Barrier (2,000 HP) to the Kamihime in position 4 of the party formation (5 Turns).
<DEF↑>: Grants DEF↑ to the Kamihime in position 4 of the party formation (7 Turns).
<Intercept>: Grants Intercept to the Kamihime in position 3 of the party formation (3 Turns).

*Thanks to JStar