Fuuka is a fairly weak and ordinary girl, but it much harder to capture than one may think, especially if they underestimate her. Her Persona allows her to sense hostile people and creatures sneaking up on her with plenty of time for her to run and hide, thus tracking her down with ill intent either relies on blind luck or cornering her somewhere. However, she's a good sport about letting people she trusts tie her up, even if she is a bit shy, so take some time to befriend her- especially when it comes to building up the courage to try her cooking. Utilize light materials for the binding and cloth for the gags so she feels comfortable and unafraid. Her face is her cutest feature so don't cover too much with the gag.