I got Viola from the 10 flower gem draw, plus three 5 stars.

Took my fourth 10 flower gen draw. All up, I have one Rainbow and 20 unique Golds (plus one duplicate).

Got my 21 golds from events (7), X Overd Crossover tickets (4) and 10 from Gacha machines.

I have been pretty lucky I guess having done around 50 draws all up (six single draws plus four 10 flower gem draws).

That's 2% on Rainbows and 20% on Gold against 0.5% and 6.5% odds respectively.