Admiral Mann is Otto's father and an admiral in the United States navy, and the two do not get along (Jim Morrison's father was also a naval admiral). He warned Otto that if he spent his life playing his guitar, his life would amount to nothing, He appeared only at Otto's wedding.
Appearances
Episode – "The Otto Show" (mentioned)
Episode – "It's a Mad, Mad, Mad, Mad Marge" - Episode – "Walking Big & Tall" (flashback)