Character: aurora (osaki eru)
Aurora is a female deer character owned by Osaki Eru.
Aurora is "bigger than a building", but has a regular sized head in absolute terms, so she has a tiny head (or small head).
Reference: https://www.pixiv.net/en/artworks/91124035
オーロラさんまとめ
ここ数ヶ月で描いてた落書きのまとめです。
この子はオーロラ（Aurora）と言います。建物よりデカいお姉さんです。
PFMOHにも出演してました。
Google Translated:
Summary of Aurora
A collection of doodles I've done in the last few months.
This child is called Aurora. She is an older sister who is bigger than a building.
She also appeared on PFMOH.
