[Insert Cirno is the Strongest Theory here:]
JESUS CHRIST DID CASSIE WROTE THIS WITH MUFFIN?!
I'm a fan of this theory too.
Check out one of the flashbacks in my RPG Post.
See what Cirno did when facing the most deadly ESPer in my Fictional Universe.
(OK, I admit in my Fanon all Youseis are stronger than they seems because I love them.)
(Wouldn't that be a darn good team?
We have Sunny, who can turn the team invisible
We have Star, who can notice the enemy's action
We have Luna, who can disable the enemy from hearing our own team
We have Cirno, who is an attacker and control ice
We have Daiyousei and Lily White/Black for Recover HP/EN
Check it out, we have Damage Output (And it's an elemental one), we have Scout, we have Stealth, we have enough supplies. If this is SRW or any other SRPG give me this team and the enemy team will fall!
Too sad the intelligence of the fairies didn't allow them to take complex actions.)