Abisai's Links
Ever since Kayin was born, Abisai would look after him at all times. He puts aside other things for his little brother. Kayin is the basic reason for Abi not looking for a love interest at the moment. Kayin's also the only one that Abisai will push his usually calm and sweet nature away for, especially when it comes to Re and other guys looking at Kayin.
Kayin is really grateful that he has Abisai. Before he met Re, Kayin had some issues with receiving unwanted attention. Abisai took care of it, putting aside his gentle nature to take care of his little brother. Kayin will never forget that, even if that over-protective streak can get in his way sometimes. He loves his brother, and hopes one day he can help Abisai in return.
Abisai does not particularly like Re. He doesn't trust Re's flirtatious manner and being with Kayin at the same time. Even though he knows Re wouldn't dare hurt Kayin in any way, he just feels doubt inside him about the two being together. Despite all of this, Abisai is on decent terms with Re.
Re is one of the very few that is not afraid of Abisai when he gets protective of Kayin. He was only taken aback by how they met, when Abisai pushed him away from Kayin in his restaurant and basically yelled in his face about leaving his little brother alone. Re and Abi are now on decent terms, but Re was told if he dared hurt Kayin's feelings, Abisai would hurt him physically.
Abisai trusts Brodie a lot more than he would with other friends of Kayin. He thinks of Brodie as a good friend, but will admit he was always still very wary about him around Kayin. Other than this, Abisai finds Brodie as a good guy and usually doesn't mind him.
Brodie has a unique perspective on Abisai. He grew up with him and Kayin, so he knows how gentle and caring Abisai can be. However, having had a secret crush on Kayin for years, he has gotten seriously paranoid about Abisai coming after him on Kayin's behalf. He is probably the most afraid of Abisai, and yet considers him an ally in protecting Kayin.