I'm trying to decide between 1 and 3 but this is Shadow. He is one of Akina's best friends and her Guardian. Ever since birth he was raised to serve and protect Akina. Eventually he fell in love with her and is fiercely loyal. Anyone who questions Akina is usually ridiculed by Shadow though she disapproves of his attitude towards others. Despite their love for each other, Shadow's younger brother Tenebris won her heart. Yep. They're related but Shadow holds nothing against Tenebris. He respects the decisions Akina makes and feels that being a guardian is closer than husband and wife.