毎年たかりに来るチビどもを鎮めるはくれいさん

Hakurei-san appeases the runts who come around to extort her every year. Strictly speaking, omotenashi is written with kanji as お持て成し; leaving out the okurigana, as in the Pixiv title, gives you "Mochinari", which is a place name. Or my online dictionary resources may be pickier than necessary.