Place it at the exact moment she appears or is mentioned, then follow it with a short reaction sound to let the name register before the next line of dialogue or on-screen action continues.
O tym dźwięku
This is a brief clip, just under two seconds, built around the name Ellie. With so little context in the recording itself, it lands as a quick, pointed call-out rather than a full line, giving listeners a sudden, slightly playful jolt that works because the name arrives on its own and then stops.