Corrinna Lee is a senior at Iris Academy. She's in Snake Hall and was the Princess of the May in last year's May Day Ball, which means she serves as the Queen of the May for this year.
In Horse Hall[]
Corrinna plays a very minimal role in Magical Diary: Horse Hall. She's the one who passes out the blindfolds on the final day of Freshman Initiation, and then she is not seen again, other than a reference by name during the May Day Ball, where she crowns an unknown junior as the new Princess of the May.
In Wolf Hall[]
Corrinna makes more appearances in Magical Diary: Wolf Hall. She's part of the Midnight Poets Society and can be met if you follow William Danson there (you must have the Blue Spell Silence to pull this off) or are on William's route. If you become part of the Midnight Poets Society, you can send her a valentine.