1. A silhouette of Tenshi occupies the front of Scarlet Weather Rhapsody's jewel case, as well as the OST.
2. It is said that Tenshi was once human, and is now referred to as a Celestial.
3. She is one of the characters to have revival spells.
4. The characters in her name literally mean Hi.
5. ZUN has said that Tenshi is innocent at heart, but went to heaven at such a young age that she never was disciplined.
6. For some reason, various fanworks show Yukari Yakumo to hate Tenshi, or at the very least, they're at odds with each other. I honestly don't get it.
7. Tenshi, despite being Iku's student, considers herself to be above Iku.
8. She has been nicknamed Peaches because of the peaches that rest on top of her hat.