I've been thinking, the six member limit per House, while somewhat making sense in-universe, is kinda weird choice game mechanically for a harem VN.
Yea there are some games where the harem is around six anyway, but here it kinda feels like an odd artificial limit.
If does feel like we'll be kinda getting around it depending on which other houses we form close bonds with, to a degree. Certainly with how things progress with House Of Darkness. But there's also the fact that we and anyone who joins our house are already breaking multiple Arcana laws, so what's one more?
I do suspect, that before we go trying to sneak more members into our house, we'll probably bend the rules/laws a little.
Like when Chandra tried to summon a really powerful Guardian, she summoned Ophelia, so my guess, and kinda hope, is that we'll help Chandra again, but this time summon someone who is both (very) powerful but also not already a member of any house. Meaning they can become our Guardian and be a legally grey area member of our house at the same time.
Would probably get us put under even more suspicion than we already are, but would be really cool and worth I think.
Especially if the person (lets be real, they'd 100% be a girl) was another illegal hybrid like us and our sister. I'm thinking part Dragon.