Tokiko Narukami is Daichi Narukami's wife and the mother of Youta and Sora Narukami. She possesses long auburn hair, typically gathered in a half ponytail, and distinctive plum-colored eyes. Her usual outfit features a yellow top, a long white skirt, and purple shoes.

Her demeanor is consistently kind, caring, gentle, and calm. When Youta contacts her about Hina Sato's situation, Tokiko welcomes Hina into their household, allowing her to stay. This compassionate act fulfills the final request of Professor Shuuichirou Korogi, Tokiko and Daichi's mentor, who was also Hina's grandfather, revealing a deeper connection behind her acceptance.

Her given name, Tokiko, blends "toki" (時), signifying "time," "hour," or "occasion," with "ko" (子), meaning "child." The surname Narukami originates from "naru" (成), translating to "become," and "kami" (神), meaning "god" or "deity."