Rennala's Students are enemies in Elden Ring. They are only found in the grand library of Raya Lucaria, with Rennala Queen of the Full Moon, and act as enemies during the fight against her. These juvenile girls wear the dark blue and red robes and crawl carrying a candle stand, from which they can spew fire.
It's clear they are malformed from the imperfect process of rebirth, with their lower half of their bodies twisted. They appear to have diminished mental faculties and serve as a minor nuisance.