I usually don't roll on character or any but itto is a different case for me I had a lot primogems and also pay a "little"
Ok for wishing you see the wishing button press esc then you see the wish button
For characters there a pity so if wish 70 times there's is 50/50 chance to get a 5 star character
Now for the juicy part
I have c6 itto and r5 redhorn the are very expensive but because I have a lot primogems and spend a little of money I can get it
There called this currency primogems you can obtain this gems by opening chest commission ques and etc
There 2 banner the character banner and the weapon banner