the leader of the red dragons the dragon queen who is wearing a wig to hid her identity since her hair is where the red in their guilds name comes from. If I remember right while she wasn't apart of his brother's team she was one of the so called kings that had stabbed their swords into his brother's back
he just sticks his little brother on them, let's him break them, and then heals them up, wash, rinse, repeat until he comes out with an army that is absolutely loyal to him due to fear.
calm down, guys. she's not sis-zoned. it's just him not falling in love with her yet. Emphasise the yet part. there will soon be a time when she will say something along the line of, "what are you doing, big brother?" and you will know it is not only love story that will come next