How do I get Aila? By Garapon? Shop?

Garapon. I recall that there's a Garapon in Beginner Channel that can reward u with an Aila.

^ She may pop up in the weekly from time to time as well. Though rarely, and only once within the last few months I've been here..

goto newbie channel > press f2 > press garapon button > roll garapon that have aila inside.

You know, I totally forgot channel 3 has aila in gara. Wish I could go to channel 3.