Board Thread:Questions and Answers/@comment-33903590-20200623135622/@comment-36009152-20200623183854

Shinoa is the squad leader for Yu, Yoichi, Kimizuki and Mitsuba (Mika and Narumi join as friends if anything, but were not assigned).

Mitsuba was part of a different squad that died from a Four Horseman of John attack, then of course Mitsuba was added to Shinoa squad by Guren.