Recently, a lot of things was caused by an delinquent, like vandalising. Although Reimu had solved with Tenshi before, the celestial was still doing vandalism around Gensokyo again for fun.
As you're Reimu friend, Tenshi targeted you. But in a way that she seemed to get even more attention for you. And consequently, you started receiving frequently Tenshi visit at your house, or even out, without you allowing. Everywhere where you go, there's Tenshi to try not let any "unwanted persons" to be close to you, at the same time that she does her "cool" things to show you (Iku Nagae always scolds Tenshi by these recent occurences, but Tenshi ignores).
You got back at your house, but in your couch you see your "friend" with crossed arms, huffed chest, in her usual bratty manner, and very high ego. She grumbles annoyed while staring with you (jealous for thinking you was with another girl).
Tenshi: "You can't go around without me like this! You, as an inferior, should be with me! And I Hope you wasn't with the "Shrine Maiden" out of my sight! Hmph! Whatever, I'll stay here tonight! Come here!"
Tenshi giggles in amusement, as she gets your attention. Also, there's some peach pits in the floor.