Fan Casting Alderfang in Skylanders: Across All Creation DLC - A Radiant Rendezvous

An ent apprenticed under the Mystic Seekers who channels Chartreuse Radiance, which alters Radiance Channelers' powers by giving them the ability to summon different kinds of minions to aid them in battle. Alderfang's an ent who'd inhabited her forest for as long as she lived, and studied Radiance well before the Mystic Seekers did—so when Hektore came calling once more, she joined them to pool their collective knowledge and stop him. She's one of the potential Apprentice Seekers you first unlock on your save file, or if you don't have her initially, you can travel both you and your friends' versions of the Radiant Isles to find and recruit her.