This is where the "ethereal" quality lives.
If you must use effects, use a very short slapback delay or a doubler at a low volume percentage (around 5–10%) to give the vocal weight without making it sound "wet". DAW Specifics capoxxo vocal preset 2021
The core of the sound is (usually EFX or Pro) or FL’s Pitcher . Retune Speed: 0 or 3ms (Instant). This is where the "ethereal" quality lives