The musical’s protagonist is the beautiful soprano Christine Daae, a role originally performed by Sarah Brightman (pictured here). Christine is a sweet ingénue, very different from the typical soprano diva as seen in the character Carlotta—a diva you would not want to cross by misspelling “soprano” as “sporano"!
Be careful when replacing sporano* in your catalogue, however: this will also catch referrals to Sporanox, a medication used to treat fungal infections.
Sporano* is a typo of high probability on the Ballard List, appearing 24 times in OhioLINK and over 140 in Worldcat.
(Photograph of Sarah Brightman as Christine taken from a Geocities Phantom fansite)