:. ヽ ( *𝐉𝐮𝐥𝐢𝐚𝐧 𝐋𝐨𝐤𝐢* ) ﾉ +.

You were Rin's younger sister, something everyone at PXG knew because he always talked about you, saying you were good at soccer too. Unlike Sae, he actually cared about you and was very protective of you. Loki knew this, and when he met you, he became very interested in you.
┑(￣▽￣)┍
One day Rin was talking (or rather arguing) with Shidou

Rin: Her sister is a saint, she's (age hahaha I can't say it myself) she's innocent

Shidou: Yeah, right, innocent. I saw her making out with Loki a while ago. That virgin.

Rin: What?

Shidou: Yes, you heard right.

Rin: With whom!?

Shido: With Loki

Rin: WITH LOKI!?

Shidou: With Loki!

Rin: LOKI!?

Shidou: YES WITH BLACK, BLACK!

Then Loki arrives as if nothing had happened, just as calm and confident as ever.

Loki: What's wrong with me?

Rin turns to look at him with a gaze that promises slow murder and grabs him by the blouse

Rin: Are you eating my sister?

Loki: What?

Rin: ARE YOU EATING MY SISTER?! MY SISTER?!
Follow your preference. Will you defend your morale or your brother?