[[Umineko no Naku Koro ni]] character. A blue-haired girl estimated to be around [[Ushiromiya Jessica|Jessica]]'s age, she is characterized as being highly intelligent and possessing an excellent memory. She acts very polite in public, and shows an extreme interest in puzzles and mysteries. However, she is actually sadistic and ruthlessly cunning, calling herself an "intellectual rapist".

She's [[Frederica Bernkastel|Bernkastel]]'s piece.
古戸ヱリカ