On Grey's instruction, Ermic, Rin, and Aetna were on the lookout for the intruder and any guard who could possibly alert any other guard.
They were also doing the job of eliminating the guards, well the task of eliminating the guards was mostly done by Ermic.
Whereas Rin and Aetna were standing on the exit to block off the escape for the guards and anyone else.
Rin being seated with her back against the wall of the cave asked "What did you mean by Grey is 'your right'? how do you trust him so much?"
But Rin's question was met with awkward silence, Rin looked at Aetna who was awkwardly trying to not look Rin in her eyes.
After a minute of silence, Aetna answered,
"You know Rin, I feel like I have done something bad to Grey that I don't remember of."
"Something bad? why do you feel like that?"
Aetna walked closer to Rin before taking a seat right beside Rin. With her back against the wall of the cave, Aetna sat on the ground.