Today's 'Fountain of Prayer' was

I earned quite a lot of diamonds!! 😀 But a lot of gold came out, so I reloaded about 3 times 😅 I can't level up my rank because SSR quests aren't showing up often in multi-quests 😰 Does the rarity required by the fountain mean it's okay if you have a character of a higher rarity than what's requested? If an SSR appears, can it be substituted with a UR?? 🤔