1- Miracle Ticket is an item that you can buy once every 4 months that costs 5000 Star Coins. It makes you able to handpick one hime of choice (Except for limited himes like Collab himes or time-limited ones like Wind Poseidon or Summer Sol).
2- It completely depends on your luck. I haven't been able to pull a new SSR hime since May. Take that as you will.

I'll proceed to close this thread down and I'll hope that whenever you have something to ask, use the Q&A instead.