New album on August 21st, titled I'LL BE BACK (she must really still be into K-pop).
Last performance and
Will update with a credible source when I can find one, but as for now, it's all over Twitter if any of you guys want to take a look. :c
Edit: Update from Natalie.mu, Aira has described it as a "temporary hiatus." I'm personally doubtful of her being able to come back, but I definitely hope she does.