Gido

From Marpedia

Gido is Ian's girlfriend and the only Pawn of the Chess Pieces to have an individual identity. She accompanied Ian in his first battle against Ginta Toramizu. When Ian is taken down, she holds her ground against the others until she is knocked down by Jack's attack. Due to Ian's loss to Ginta, Halloween had Ian punished by ordering Chimera to transform Gido into a creature with her body fused with tentacles, unable to of speak as she transforms slowly into the hidieous creature.

Eventually she is returned to her human form by Chimera's death and the couple leaves the Chess Pieces. In the anime, they meet up with Ash, who they quickly befriend, Ash dies protecting Ian and Gido from King, who return the favor by taking care of Ash's friends. Once Ash is revived, she and Ian continue to live with Ash and his kids.