User blog comment:B214/Question & Answers 5/@comment-3965848-20150506213413/@comment-3965848-20150506222345

Saji's enviness towards issei is on more how strong he is and that he's already in a relationship the girl he loves.

while the guy within the committee are only jealouse of who close he is with Rias, Akeno and several other girls specificly, and currently Saji only has his heart set on Sona so he wouldn't fit in iether way.