User blog comment:Daniel 1939/About the Supporting Casts/@comment-24034641-20140119093233

Lisbeth had her own episode in the anime, and story in the L.N, same as Silica, Klein and Agil not so much.

AND again, Light Novels before the anime, they're all still friends later on down the track in the series, you should read the L.N, it'd answer many of the questions you've asked.