I'm very tired, but hopefully this one came out well.
The Inner Discipline Club... While it's probably an even split of chores among the trio, Mimori almost certainly takes initiative and does a lot for them. That likely leads to similarities, but also unique differences that stand out more because of those same similarities. It'd be a very comfy place to live.
This is also a wrap of Hyakkiyako, as I've gone over every student. They're a passionate bunch, that much is undeniable. The Festival Operations Department is the most obvious example of this, being so fervent in their work that Hyakkiyako could be known as a school you go to for a party. The Ninjutsu Research Club toil endlessly, trying to attain recognition and prestige over their beliefs in the unseen warriors of yesteryear, making them an incredibly effective scouting and fighting team. The Hyakkaryouran is the conventional peace-keeping squad, with such proficiency in what they do that they'll cut through any darkness so Hyakkiyako may enjoy sun-filled, fun days. The Inner Discipline Club works day and night for, well, "Inner Discipline", showing unique methods to go at it. Those said "unique methods" are reminiscent of the Yin-Yang Club, in how Niya's a relaxed strategist, Kaho being a serious (yet passionate) tactician, and Chise being a unique operations officer.
Even Hyakkiyako's "threats" fall under this same passion: Wakamo being an unstoppable force with only one person she'll bow to, the Mouryu believing in Hyakkiyako much the same way Genryumon protects Shanhaijing from outsiders (even if they're outlaws as a result), and even Nature's Beauty is driven to see their ends be achieved, though these "ends" are still quite loose as of yet.