Marina Tendouji

Marina Tendouji (まりな) is a minor antagonist in the Oshi no Ko manga series. She is the estranged mother of Sarina Tendouji (Ruby Hoshino's past life) who unexpectedly enters the lives of the twins during the production of 15 Years of Lies as part of the work's advertisement personnel.

Appearance
Being in her 50s, Marina's age shows through the multiple wrinkles she has on her face. She has curly-brown hair and is of average stature.

Personality
Marina is a sociable woman who enjoys going out with her co-workers, admitting to having something of a drinking problem. She also deeply loves her family, especially her children, caring greatly about their health.

However, because of her cheerful nature, she struggles to handle grief. When her first-born daughter Sarina Tendouji was diagnosed with a terminal illness, Marina fell into depression. As a result, she opted to cope by ignoring reality, minimizing her contact with her daughter so she would not feel sad when she was gone. However, despite all her actions, Marina was still saddened upon learning of Sarina's death, wondering how her daughter must have viewed her for abandoning her. Over time, though, she was able to move on by filling the void in her heart with two more children.

Background
When she was younger, Marina used to be a figure skater. At some point, she got married and had a child named Sarina Tendouji. Marina greatly loved her daughter, but when Sarina was 4 years old, she was diagnosed with a terminal illness that would likely kill her within 10 years. This news caused Marina to fall into depression, prompting her husband to separate the two for her own well-being by sending their daughter to the finest hospital in the area. To cope with their daughter's inevitable passing, they completely concentrated on their work and minimized contact with her. In the end, Marina did not see Sarina again before she passed away.

After learning of Sarina's passing, Marina felt guilty over having effectively abandoned her, wondering how her daughter must have viewed her. Over time, however, she overcame her grief by having a new daughter and son and she now lives a happy life with her family whilst working for an advertising agency.

Sarina Tendouji
Marina used to love Sarina very much, but she couldn't deal with her daughter's terminal illness, so she decided to avoid Sarina as much as possible to forget cruel reality.

Etymology

 * The name Marina is written in hiragana (まりな), which has no special meaning. However, when written in kanji (真里奈), it could possibly mean "real, genuine" (真) (ma), "village" (里) (ri) and "apple tree" (奈) (na).
 * Marina's surname Tendouji means "cherub, gods disguised as children, children parading as cherubs" (天童) (tendou) and "temple" (寺) (ji).

Trivia

 * Marina is known for being a hard drinker during parties and her own children even tell her not to get too drunk all the time for her birthday party.