Does her eating give her the ability to see the top card of your deck?
D-LBT02/021 RR 2022 食べ過ぎ注意！ アイリーン Beware of Overeating! Eileen
Grade 1 / Normal Unit / Lyrical Monasterio – Mermaid
AUTO (RC) When this unit boosts a rear-guard, look at the top card of your deck, and put it on the top or bottom of your deck.