Ada

is an Outer from the organisation Kara.

Background
In his plot to kill Jigen, Amado heavily modified Ada with Shinobi-Ware, along with an unspecified amount of Outers with capabilities exceeding that of Jigen. Because of this, Jigen had ordered for her disposal. Boro, who was given the order, instead hid Ada in a remote location operated by his cult for his own uses.

Abilities
As with most members in Kara, Ada had been modified with Scientific Ninja Tools by Amado. While the true depths of her power is unknown, Amado has noted that her combat abilities exceeds Jigen's. Under what context is unclear, but Code refers to her as one who knows everything about the world, imply vast depths of knowledge.

Post-Kawaki Arc
After the deaths of both Boro and Isshiki Ōtsutsuki, Code locates Boro's hidden establishment managed by Bug. Bug states he would lend Ada to Code if he is paid, where she was found in stasis.