Quote Originally Posted by soranokira View Post
yellow crystals = revival crystals, they can be used to trade for revival units (currently ongoing revival is rowanna the avenger).

that spirit is probably bonbori. look at its skill, it has the same skill name as the revival unit (rowanna in this case) and is meant to be used to SU the revival unit but can also be used to SU other units with the same skill (like Cuterie CC'd also has same skill as Rowanna)
Thank you for the quick answer.

Well i'm an idiot, i could have realised the revival crystal's jap name matched one of the units in the TP.

I took a look at this rowanna. She doesn't seem that strong (or am i mistaken ?), would you say it is better to wait for another one ? And if i wait for the next revival unit, will the bonbori i gathered go to waste ? (i don't have units with rowanna's skill)