The cousins are the blue haired kid and raon. The others are just vessel families
They explain something about the branch .family's earlier on. I'm pretty sure they're cousin. I need to go back and check
Runan's family for example is not a relative in any form, they're only immediate lineage due to their contribution and loyalty to the house of zieghardt. No blood relation whatsoever. Not sure about martha, but it's probably the same..
I've read the novel until 400 chapter. Don't worry, there is no romance so far. They became really good comrades/ friends.
Martha is Burren and Raon's adopted cousin. Not blood related but technically a cousin.
Burren and Raon are cousins, Martha was adopted by their uncle, and Runaan's family basically are a different noble family who work for the Zeigarts the Ice affinity runs in Runaan's family.
Having said that, like the mrvcklds I'm reading the novel and Raon is very busy getting stronger, healing from being raised as a tool and looking for revenge there's no romance so far and Runaan won't be the only one who Raon helps like this.
Martha’s adopted so she doesn’t have blood relations either. However she remains a cousin of his through adoption. It’s really Ruuna/ family that isn’t related to
His and a bunch of other classmates as well.
Ye, that's why I didn't really wanna define the relationship between martha and the direct lineage, since she's not related by blood but is technically a legitimate cousin due to adoption
Like I'm getting romantic sub plot vibes and I will drop this whole thing. They are all technically cousins like y'all are blood related quit playing with me