Star Points.

Star Planet.

Now that AFK'ing in One Card is no longer profitable, the games go pretty briskly. And the new stuff in the Rewards Shop is bringing people in, so there is no problem finding a game.

You can get up to 1500 reward points a day from Star Planet. Just a few days to get that pet.

Buying NX is an extremely inefficient way to get Reward Points. It's only 5%, so you'd have to buy something that costs 20x as much as that pet. But if you're willing to pay that much for her, that's certainly faster than Star Planet.

Is that 1500 on the same character per day or do you mean different characters on different worlds?