Santana

Santana (サンタナ, Santana) is an ex-worker for Snakes who runs a karaoke cosplay bar in the streets of Shanghai while working with Hakko to assist other Borners and Unblooms to find refuge from Snake.

Yuri Natsume
In addition, Santana is an acquaintance of Natsume.

Hakko
Santana saved Hakko when her village was overrun and develops feelings for her later on. He is rather protective of her that he is willing to enter into a physical altercation with Minoru for asking her too many questions. He assists Canaan, Minoru and Maria to revisit the destroyed hometown village and the factory. He confronts Liang Qi at the factory, but he is captured. Liang Qi manipulates Hakko into accidentally mortally wounding Santana with her deadly voice.

Santana dies in Hakko's arms as she whispers her love to him.