A seventeen-year-old alchemy warrior named Tokiko was tasked with resolving a homunculus problem in Kazukis town. When Kazuki tried to save her from a homunculus (who she had actually been controlling), she felt an attachment to him and revived him using a kakugane, intending to ensure his safety. Tokiko is highly committed to her job and despises all homunculi due to the trauma she experienced as a child when everyone in her school was killed or eaten except for her. As a result, she takes things very seriously, which can sometimes lead to awkward situations with Kazuki and his friends. Captain Bravo later assigns Tokiko to attend Kazukis school. Her battle quote is "Ill rip your guts out," which she has used to tear apart many enemies.