At 2-years-old (15-months-old before Season 5), Lily is the youngest of the Loud siblings. She is able to walk independently, and is learning to speak. Before Lily was potty trained, she had a tendency of soiling herself, leaving a foul stench known to disgust her siblings, and often removed her diaper, forcing her siblings to constantly have to put it back on. Lily has a habit of crying. Lincoln always changed Lily's diaper in Lisa and Lily's room. Starting in "Schooled!", Lily is potty-trained and attends Royal Woods Preschool.