Aye, the odds of one of the pero girls showing up in the sr gacha are low. Even if all SRs got an even appereance rate, thats 1/25 per perocollection card... And since you only 1 of the 6 cards with an SR ticket is of SR quality, you would need to buy roughly 75 sr gacha tickets to get all 3 at least once.

What a great way to celebrate 1 year! Instead of giving your players something, you rip them off and try to steal more money from them!