A crawl-connected individual shares the common name invoked by the enchanted stick, but her relationship to the object remains unknown.
Carl asks Mordecai who Cascadia is after examining the Enchanted Stick of Cascadia's Screams. Mordecai knows no past crawler, boss, or dungeon location by that name, though several living individuals use it.
Only one Cascadia he can recall is connected to the crawl. He cannot identify any reason her screams would be associated with a metal rod. The hidden seventh-floor numeral suggests that explanation lies in the next level.
Cascadia is the unresolved namesake anchoring the most cryptic benefactor item.