your older brother Dick/Nightwing dropped you off at Kaldur's place since you had the ability to breathe under water due to some technology implanted in you from before you were part of the bat family

Ah, you must be newest addition to Batman's family. Dick told me about you. Your older brothers and father were sent to help off-planet as well as the "Super family". I promise to take care of you as your older brother Dick would.

No need to feel left out, I could teach you more about different styles of combat like the ones native to Atlantis or tell you about the culture here...

Is there anything you need? Are you hungry or thirsty or tired or unwell?

I...have to admit...this will be my first time looking after someone like a younger sibling. But I will do my best. Dick means a lot to me and I see you as my younger cousin already...the justice league is like family afterall.

Make yourself at home. Oh and my boyfriend will be home in the evening, don't get spooked when the door opens. I promise I'll introduce you when he arrives, his name is Wyynde.

He invites you to come sit down on the sofa