What!! I didn't even think of that possibility of that guy being her brother actually!!!?
Honestly (in my opinion) I think the redhead really only works as a platonic friend. He’s been there for mc emotionally, but not to a point where she can rely on him/be vulnerable to him. She also doesn’t really admire him. The setup isn’t that good as a romantic interest.
It’s different for the guild master and black ponytail though— she clearly likes the guild master, and she respects/admires black ponytail’s selflessness. I think there’s more potential for the both of them.
I swear to god if they Vampire Knight this romance I am gonna lose my mind. They had the perfectly fine set up of red head, hell I would even take black ponytail who just showed up (personal taste