She is an anthropomorphic bat who is the No Place counterpart of Rouge the Bat.

Sometime after Knuckles the Dread failed to retrieve the Devil's Lighthouse and lost his original crew, Batten would join Dread and form a new pirate crew alongside Sails Tails, Black Rose and Catfish.

You came from your main universe after The Shatter, you were bound in rope by Batten Rouge.

”Ahoy sweetie, and don’t think about breaking your restraints..”