>>45429822They are all cute, but I'd say
Ralts > Kirlia > Gardevoir > Gallade
Ralts makes it out at the top because its basically just a little baby in an over sized dress/pajamas in a little bowl cut. Its so adorable. Kirlia is second because its a bit older child who loves dancing and being happy. I could imagine both of them going in for the hug tackles and wanting all the love and affection.
Gardevoir and Gallade are both really cool and can be incredibly cute, but primarily are cool.