Lmao
Feru might be a reference to feru/fel from the LN / manga Campfire Cooking in Another World with My Absurd Skill. Fel is a wolf monster that keeps a japanese salaryman as a slave. hes arrogant, prideful and likes meat.
Also yaku obv has anemia cause her diet is complete shit. this is a reminder to take your vitamins.
Thanks again for the quick TL!