Mutsumi (ムツミ) is the daughter of Uitsualnemetia. She was created from the DNA of Iceman. Mutsumi is reincarnated as an alternate personality into the black-winged Onkamiyamukai every generation. She currently shares a body with Camyu.
Mutsumi is largely emotionless to others but that doesn't mean she has a cold heart. Obedient as she is, she would follow the commands of her father due to her love and loyalty to him, no matter which side of her father she is aligned with. For example, she fought Hakuowlo, whom she regarded as her other father, despite knowing that both Dii and Hakuowlo were her father's split natures. This was partly due to Dii's command, and partly because Hakuowlo chose Camyu over her. She has the feelings of love and fear, which is mostly directed to her father. In the context of the latter, she pleaded with Hakuowlo not to disturb Dii as their fighting, which is forbidden, would only lead to destruction and suffering on their part. According to Camyu, Mutsumi became very happy when she was reunited with her father and decided to return Camyu to everyone after granting his wish to sleep once again.
Mutsumi was created as Experiment #63 from Iceman's DNA and was the strongest specimen to be created. When her father asked to be destroyed after turning the human scientists into tatari and failing to control his darker side, she fulfilled his request, but even with the satellite weapon Amaterasu, or the Purifying Flame in the Onkamiyamukai tongue, she failed to destroy her father and instead damaged the Earth's environment even further, with only the freed experiments left to survive. She decided to seal him in the earth, but before she could, her father's soul was split in two and they became separate entities. Sometime later, she founded Onkamiyamukai and its devoted worship to her father, and for many generations she was reincarnated through the line of her descendants with black wings. According to legend, the reason she does this is so that she can be with her father.
Uitsualnemetia - Mutsumi loves her father deeply and is very loyal to him. She would gladly obey any command given, even if that meant destroying him or sealing him away. Throughout her life, she sought to be reunited with him and according to Camyu, was very happy during Hakuowlo's sealing.
- Mutsumi's name is a play on her experiment number #63: "Mutsu" is a variant reading of 6, and "mi" is a common reading of 3.