Angel is a silver-haired girl who is the student council president at the afterlife school. This places her at odds with the SSS as her responsibilities require her to suppress delinquency and other disruptive activities that the team does. The SSS initially call her "Angel" since they do not know her real name, but they still refer to her as Angel even after finding out her real name to be Kanade Tachibana. It is difficult to understand what she is thinking due to her rarely showing any outward emotions. Angel's life is one of solitude because any soul who befriends her will eventually disappear after living a fulfilling school life. She does not have any friends until Otonashi befriends and invites her to participate with the rest of the SSS.
She defends herself with supernatural abilities known as "guard skill". The primary one that she uses is called "hand sonic", one or two blades on each wrist that are capable of changing into five different forms. Other skills include but not limited to are: "distortion", an invisible barrier that deflects bullets or other projectiles away; "delay", which creates an after image to disorientate the enemy in close range; and "harmonics", where a clone is formed from the original with a consciousness of its own. These abilities are activated by voicing their name. Others like "overdrive" which gives her great physical strength are passive and is continually on. She creates all of her abilities by herself, just like how the SSS produce weapons instead of receiving them from God like how Yuri originally believes.
Despite her gentle demeanor and tiny frame, Angel is incredibly powerful and near indestructible to the point of ejecting bullets out of her wounds during battle. She has an affinity to eating mapo doufu, a spicy dish which has such an effect on her that she even once disobeys school regulations to be treated by Otonashi. She is personally dedicated to helping others overcome their regrets and grudges and pass on to whatever lies after this world.