Hina’s reference is the Odin from The Day I Became a God anime series

The Day I Became a God (神様になった日, Kami-sama ni Natta Hi) is a 2020 Japanese anime television series produced. It aired from October to December 2020. The story was originally conceived by Jun Maeda, who also wrote the screenplay, with original character design by Na-Ga. Both Maeda and Na-Ga are from the visual novel brand Key, and The Day I Became a God is the third original anime series created by Key following Angel Beats! in 2010 and Charlotte in 2015. The story revolves around Hina assisting Yōta as he helps people around town while she adjusts to her new life. As he spends more time with her, he begins to uncover more secrets about her life and how she became a "god".

Hina Satō (佐藤 ひな, Sato Hina), also known as Odin (オーディン, Ōdin), is the female protagonist of Kamisama ni Natta Hi. She is an ordinary girl who awakens as a deity.

Odin is a widely revered god in Germanic mythology. Norse mythology, the source of most surviving information about him, associates him with wisdom, healing, death, royalty, the gallows, knowledge, war, battle, victory, sorcery, poetry, frenzy, and the runic alphabet, and depicts him as the husband of the goddess Frigg.

In Old English texts, Odin holds a particular place as a euhemerized ancestral figure among royalty, and he is frequently referred to as a founding figure among various other Germanic peoples, such as the Langobards, while some Old Norse sources depict him as an enthroned ruler of the gods. Forms of his name appear frequently throughout the Germanic record, though narratives regarding Odin are mainly found in Old Norse works recorded in Iceland, primarily around the 13th century. These texts make up the bulk of modern understanding of Norse mythology.