I did a bit more digging - it looks like the novel website is actually out of date. There are now three volumes in the series, the newest of which only came out this month:
1.
ストライクウィッチーズ—スオムスいらん子中隊がんばる
2.
ストライクウィッチーズ 弐ノ巻スオムスいらん子中隊恋する
3.
ストライクウィッチーズ 参ノ巻 スオムスいらん子中隊はじける
Poor girls. ”いらん子中隊” is just harsh.
After checking the novel titles and blurb text, I think Sakomizu's website profile quote will probably only come into play in volume 2.