A-E-I-O-U is a song from "Alice in Wonderland". The song is something random that the Caterpillar sings just before Alice arrives and he smokes on his hookah. It is sung by Sebastian, who portrays as Trixie Tang's Caterpillar in "RMCF: Down the Rabbit Hole.
A-E-I-O-U A-E-I-O-U A-E-I-O-U O U-O-I-E-A U-I-E-A A-E-I-O-U
- The Caterpillar(Alice in Wonderland)
- Sebastian(MCF: Black Butler)