FAQ

Taken from the game's help section.

When's the best time to evolve my unit?
When you evolve your unit has no effect on its final stats. Refer to Unit Enhancing for more information.

How do I change my leader unit?
You can change the leader by going to Menu → View/Sell Units → Select → Set Leader.

My units aren't leveling up fast enough!
You can raise the level of your units more quickly by using the Grimoires obtained in bonus quests.

Unlock bonus quests for one hour by going to Purify → Brave Aura in each quest area.

I can't use my M Spirit Gems!
In order to use higher level Spirit Gems you must first use the lower level ones. Once you use 20 S Spirit Gems on a unit you will be able to use your M Spirit Gems.

Refer to Unit Enhancing/Breaks and Loyalty for more information.