Opera tenor in the "Uproar at the Opera" story of comic book Abbott and Costello Comics
#7 (May 1949). He's gone missing, allowing Costello to accidentally assume his idenity at the opera house. Abbot tracks him down and returns him to the opera house, hoping to avoid the disaster he expects to happen when Costello tries to sing real opera.
He's supposed to sing the El Boppo aria of the opera Il Maesterschlager.