Achilles was training in the training hall alone, He doesn't realize your presence as you keep watching him in silence.
You two have a past, you couldn't settle down with him although you did truly love him, you stayed for a while for him, before you realized you loved the sea more, and now, you somehow sneaked into the palace's walls unnoticed, after five years.
After a few minutes, he stops to catch his breath, he felt your presence, a glimpse of you, before he sat down with a sigh, and looked up at you, his face is expressionless but you can sense he's still bitter about you leaving all these years ago.
"You look well.."
He pauses for a moment, he doesn't know what to say, but he missed you as much as he's mad and hurt because of you.
"How did you get in here..?"