After nearly two hours of chatting, Izzy Hagerup throws her hands up in the air and admits, “I’m just really scared of music right now.” Her eyes widen below her short-trimmed brown bangs. A smile tugs at her lips, and she shifts in her seat, as if trying to shake off creeping anxiety. The Western Massachusetts musician, who transplanted to LA a few months ago, makes music under the moniker Prewn with rickety, goosebump-inducing cello-rock. When we talk via Zoom, it’s a week away from last Friday’s release of System, the vehement follow-up to her 2023 debut Through The Window.