Description
This character is known interchangeably as Takeru Tendo or Takeru Amato within the Etotama media. He is a high school student living alone in Akihabara. Physically, he has short black hair, amethyst eyes, and wears distinctive red glasses. His typical attire consists of a white shirt with black sleeves featuring orange diamond patterns and chessboard motifs, a red tie with similar patterns, black pants, and light-gray shoes. He stands 176 cm tall with a lean build.

He possesses the rare ability to generate "Sol/Lull" energy, a vital life force for Eto-musume and Eto-Shin (zodiac spirits). This energy emanates from human emotions like gratitude and enables the spirits to transform for combat. His Sol/Lull output is exceptionally potent, making him a target for entities seeking its power. Despite being human, he contracts a "Divine cold virus," indicating unique physiological interactions with the supernatural.

His background identifies him as the prince of gods and demons, a heritage sparking conflict between factions vying for his allegiance. This royal lineage contrasts with his ordinary student life. Personality-wise, he serves as the primary "straight man," reacting with deadpan exasperation to surrounding absurdities. He demonstrates protectiveness towards those he cares for, particularly the zodiac spirits residing in his home.

Key relationships define his story:
- With Nyaa-tan (the cat spirit), their bond evolves from frustration over her freeloading and schemes to genuine concern, especially upon her regaining memories.
- He shares a close, sibling-like rapport with Uri-tan (the squirrel spirit), relying on her to explain supernatural events; his distress at her apparent death underscores their deep connection.
- He engages in shogi matches with Piyo-tan (the chicken spirit), bonding over this shared interest.
- Mei-tan (the sheep spirit) develops romantic feelings for him after curing his illness, though he views her platonically.
- He maintains mutual respect with Shima-tan (the horse spirit) through shared concern for Nyaa-tan's well-being.

Across all media, he remains the sole voice of common sense amidst the chaotic zodiac spirits, balancing his human responsibilities with his unintended role in supernatural conflicts.