User blog comment:B214/Question and Answers 2/@comment-3965848-20140219162058/@comment-1359322-20140219163603

Lirenkus is just an Oppai Dragon fan. He appeared in Volume 10, getting Issei's autograph, that's his only role. This time he is probably just asking Issei if he could become a "hero" by joining Sona's school.