|Novel Debut||Volume 11.5|
Tatsuo Itsuka (五河 竜雄, Itsuka Tatsuo?) is the father of Kotori and the foster father of Shido.
The father of Kotori and foster parent to Shido, Tatsuo is one of the employees in Asgard Electronics, <Ratatoskr>'s parent company. According to Kotori, he was part of the crew that helped create the Fraxinus and that he knows about the existence of Spirits, but doesn't know how they looked like until the events of Itsuka Parents.
Tatsuo is described as a person who is always smiling under his dark green glasses and has a distinguishing hunchbacked posture.
Despite being a genius engineer, even his own wife admits that he is a little bit too naive and would have been scammed numerous times without her help. Despite this, Tatsuo remains a cheerful and upbeat individual, being willing to trust and befriend the Spirits despite their disastrous first encounter.
During his youth, Tatsuo was noted to be friends with Shinji Takamiya. One time a beautiful girl came to their class to deliver an item Shinji had forgotten, causing a huge uproar among him and his classmates. He eventually got married to Haruko Homura and had a daughter, Kotori.
Tatsuo and Haruko adopted Shido at a very earlier age after the boy was abandoned by his mother. Due to the nature of their work, both he and his wife had to relocate to the United States, leaving Shido in charge of the household chores in their Japanese home and looking after their daughter.
- Light Novel
- Volume 11.5
- Volume 18 (Flashback)