Lily Adams, known in Japanese as "Keita no Haha" (ケータの母), is the mother of Nathan "Nate" Adams and wife of Aaron Adams in the "Yo-kai Watch" series. She resides in Springdale with her family, appearing across games, anime, and films.
Lily possesses brown eyes and long brown hair, typically wearing glasses. Her signature outfit features an orange scarf with white polka dots, a pale yellow rolled-up long-sleeve shirt, light gray denim shorts, dark brown tights, and yellow ballet shoes. She wears an apron for housework and a purple leotard with yellow leggings and lavender leg warmers for workouts.
Her personality balances kindness with strict discipline. She shows devotion through acts like cooking, buying rare snacks, or baking homemade cookies for Nate. However, disobedience triggers intense anger, humorously called her "Monster Mom" persona in the "Yo-kai Medallium." Nate once stated he'd rather confront the Oni Yo-kai Gargaros than face her wrath. Despite this, she retains a soft, loving side.
In "Yo-kai Watch," Lily serves as the player's mother if Nate is selected, cooking meals during afternoon hours. Early on, she argues with Aaron over neglected housework, later revealed to be caused by Yo-kai Dismeralda's influence. After Nate defeats Dismeralda, Lily reconciles with Aaron, and the family prepares dinner together. If Katie is the protagonist, Lily appears minimally but remains interactable at Nate's house. In "Yo-kai Watch 2," she retains her cooking role and argues with Aaron over Spirit or Soul Donuts, with outcomes varying by game version. In "Yo-kai Watch 3," she moves to St. Peanutsburg (BBQ) with the family, loses her glasses (found on a fire hydrant), and prepares a celebratory meal for their new home.
Lily debuts in the anime Episode 1, arguing with Aaron over yogurt due to Dismeralda's inspiriting. After Nate resolves the incident, they reconcile. Subsequent episodes highlight her strictness: Episode 4 shows her ordering Nate to clean his room and becoming angry when he disobeys; Episode 18 tasks Nate with awaiting a delivery man, leading to grounding when he leaves; Episode 34 depicts her possessed by Hitomakasennin, becoming lazy and relying on Nate for chores; Episode 17 shows her influenced by Sunesnake on Mother's Day, acting whiny and unappreciative of gifts.
Her relationship with Nate is caring but contentious; she scolds him for disobedience but he calls her his "best mom ever" in episodes 3 and 38. With Aaron, she is typically affectionate, noted by Whisper as so loving that Dismeralda grew envious. Their arguments stem from Yo-kai interference but resolve amicably.
In "Yo-kai Watch Shadowside" and the film "Return of the Oni King," set 30 years later, Lily is married to Aaron and grandmother to Nate and Katie’s children, Summer (Natsume) and Tate (Keisuke). During the Oni King crisis, she and Aaron are infected by the Onimaro virus, transforming into ogre-like beings who attack Summer. After being turned to stone temporarily, they are cured following the Oni King’s defeat.
Her name distinguishes her from "Lily," Hailey’s classmate. Design similarities exist between her and Tamako Nobi from "Doraemon": both are glasses-wearing mothers with strict yet loving demeanors. In Japanese media, she and Aaron lack given names, referred to solely as "Keita’s mother" and "Keita’s father."