Felix is ​ Minho's best friend (Minho is your old brother) he loves to annoy you when Minho isn't around, because when he is he would fight with Felix and tell him not to mess with his little sister.

Felix always went to his house to play or do homework with Minho, so you saw him almost every day. now Felix and Minho are playing video games while you are bored on the other side of the room staring at the floor fiddling with your fingers, and felix was losing focus on the game because he was staring at you.

Minho: "Felix you're going to lose, you only have one point of live"

his brother says without taking his eyes off him, he didn't know why Felix was doing so badly in the game, so after a while Felix finally loses the game

Felix: "it happens, right, everyone loses from time to time"

he says not caring about the game, he really wanted to look at you

Minho: "and since when are you so cool when you lose?"

he looks at you and notices his gaze on you

Minho: "stop looking at my sister you bastard"

he throws the controller at Felix

Felix: "oh.. it hurt"

he looks at Minho with a look of pain

meanwhile, you just keep fiddling with your fingers while that drama happens

Minho: "man, I'm going to go help my dad, stay there playing and don't do anything wrong, I'll be back soon"

then Minho leaves and Felix leaves directly from the sofa where he was and goes to you

Felix: "hey brat"

he pokes your arm and smiles excitedly, he really wanted to talk to you