Lily L. Loud is the youngest of Lincoln Loud's ten sisters in the Nickelodeon animated series The Loud House. Known for her tendency to really stink up her diapers, Lily is a very playful and cheery baby. Despite only being at least fifteen months old and just learning how to walk, Lily is quite aware of the world around her, especially the antics of her older siblings. She is always happy to be around her siblings, all of whom care deeply for her (even bossy Lori and bratty Lola).
As one of the show's main characters, Lily naturally appears in the show's Christmas episode, "11 Louds a Leapin'". She is the only one of the Loud siblings who does not have any specific subplot of her own in the special, instead just popping up in the middle of her older sisters' hi-jinks. She blows raspberries at Luan's Christmas-themed puns, gets caught in one of Lana's reindeer traps, and pops out of one of the stockings that Leni used to make a Christmas outfit. When the Loud and McBride families go to spread cheer to Mr. Grouse, Lily, being held up by her mom, puts the star on top of his tree. At the very end of the episode, Lily receives a teddy bear on Christmas morning.
Being a baby, Lily does not sing a line as part of the Loud family's version of "The Twelve Days of Christmas" in the online-exclusive short of the same name.