New Union leaders

Ephemer
Trained by Ava of the Dandelions
Keyblade: Starlight
World: Daybreak Town

Skuld
Trained by Ava of the Dandelions
Keyblade: Starlight
World: Daybreak Town

Ventus (a.k.a. "Ven")
Trained by Master Eraqus
Keyblade: Wayward Wind
Keyblade Upgrade: Lost Memory (Vanitas's χ-blade)
World: Land of Departure

Brain
Trained by Ava of the Dandelions

Strelitzia
Trained by Ava of the Dandelions

Lauriam (aka Marluxia)
Trained by Ava of the Dandelions