Seiko Ayase from Dandadan
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Seiko Ayase: Skilled Medium and Grandmother of Momo Ayase in the Manga Dandadan
Central to Dandadan, Seiko Ayase also known as Santa Dodoria plays a crucial role as a renowned medium. She accompanies and protects Momo and her friends during numerous confrontations with paranormal forces such as spirits and extraterrestrials.

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Appearance
Despite being a grandmother, Seiko maintains an elegant, slender figure. Her white hair is often styled in a voluminous bun, paired with iconic rectangular red glasses. A heavy smoker, she is frequently seen with a cigarette in hand. Her distinctive beauty and youthful appearance sometimes lead to confusion with Momo's mother. Her height is similar to that of her granddaughter.
When out, Seiko usually wears a yellow cardigan with large buttons, a cross-strap top, and a blue baseball jacket with white sleeves adorned with a back pattern. She completes her outfit with hoop earrings and sandals. At home, her attire is more casual featuring a white tank top, shorts, and a beige haramaki, complemented by matching wristbands and stirrups.
Under the alias Santa Dodoria, she dons a mysterious outfit with a mask, pointed gloves, and a covering cape that reveals only a large bow. In Momo’s childhood, Seiko wore traditional shrine attire and sported a ponytail.
Personality
Seiko is calm, almost phlegmatic, and speaks in a straightforward tone. Nevertheless, she demonstrates great empathy and commitment to mutual support. She often welcomes those in need but declines rewards, encouraging solidarity and mutual aid instead.
Her mature sense of duty drives her to ease the burdens of younger people so they can live fully. Independent and perseverant, she often refuses help, embodying an elegant mix of pride and generosity. Her playful side sometimes shows in teasing Momo or jokes, though she also humbly apologizes when needed.

Seiko strictly respects the laws of coexistence between the living and the dead, pushing threatening spirits back to the afterlife whenever necessary.
A passionate cook, she loves feeding those around her, saying “life begins with good food.” However, she does not tolerate bad manners at the table. Though she firmly believes in spirits, she remains skeptical of legends about UFOs and extraterrestrials, considering them myths.
Origins and Family Relationship
Since Momo’s childhood, Seiko patiently passed on her mediumship gifts through daily rituals. Despite occasional mockery that strained their relationship temporarily, sincere apologies helped strengthen their bond and ease tensions.
Abilities and Powers
General Skills
Against numerous supernatural threats, Seiko is a pillar for Momo, Okarun, and their group, wielding a wide arsenal of spiritual skills and martial techniques.
Physical Skills
- Increased Strength: Rigorous training grants her power sufficient to inflict significant damage and surpass normal human speed.
- Speed and Reflexes: Easily dodges perilous attacks, demonstrated during fights against yokai.
Tactical and Mental Mastery
- Mystic Barriers: Creates effective magical protections to repel hostile spirits, notably during the battle against Turbo Granny.
- Advanced Strategy: Skilled at devising complex plans, she traps enemies by combining several innovative techniques to optimize attacks.
Spiritual and Martial Skills
- Mediumship: Expert in communication and control of spirits, often called upon when other mediums fail.
- Hand-to-Hand Combat and mastery of the “Nessie” bat: A formidable weapon capable of causing heavy damage both on the ground and in close combat.
- Improvisation: Agile use of available objects as weapons.
- Culinary Art: Talented cook attentive to the well-being and health of those close to her.
Supernatural Powers
- Spirit Perception: Detects and interacts with invisible spirits and yokai.
- Divination: Uses a crystal ball to gain precise visions and information about people or events.
- Borrowed Divine Energy: Channels powers from local gods to erect protective magical barriers.
- Protective Barrier: Casts spells to exorcise and imprison spiritual entities, power varying with the invoked god’s strength.
- Word Power: Commands incantations with conviction, amplifying her strength and attacks, especially via her signature technique, “Nessie”.

Equipment
Her favorite weapon, the “Power of Nessie” bat, is reinforced by her linguistic talent enhancing her attacks. Other notable items include:
- Talismans to detect and seal spirits, carefully placed in her home.
- Charmed nails: mystical nails used to support her magical barriers.
- Crystal ball for divination.
- Protective robes resembling bulletproof vests, offering defense against evil entities.
- Special harisen used to expel spirits affecting people.
Etymology
The name Seiko combines the Japanese characters for “star” (星, sei) and “child” (子, ko). The surname Ayase means “patterned fabric” (綾, aya) and “rapid current” (瀬, se), evoking fluidity and origin.
Anecdotes
- Seiko often shares meals she cooks with Momo and their friends, frequently marking the beginning or end of their adventures.
- Her sleep mask is reminiscent of Sougo Okita's from Gintama, a humorous nod.
- Several enemies erroneously believe her powers come from yokai, sparking curiosity about the true origins of her abilities.
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