[quote=Kissu]
Awww, I was genuinely going to get Leiko to join Archery for spoilery plot reasons too. XD Ah well~
[/quote]

I have a feeling Leiko wants to own every single club at WHS, but now must work to destroy the Archery club so she can become the true ruler of all the clubs!

But in all seriousness I'm incredibly curious why Leiko would want to join a group of people shooting things with arrows. If they're spoilers for character story though, I can wait as long as I need to.