Varka is known as the grand master of Knights of Favonius. He's not in the city and off for exploring now. You can see notes about him in some character's voiceleines.
He's speculated to be one of the unreleased playable characters.
My father left on the expedition with Grand Master Varka... I hope they are okay. Oh, what am I worried about? The Grand Master is none other than the Knight of Boreas, of course, they will be fine! Still, I will be sure to pray for their safe return.
He's my role model! Talk about team leaders- he's the Grand Master! Leads the whole darn Knights of Favonius! How incredible do you have to be to do that!? Recently, though, I've been thinking that having a smaller Adventure Team isn't such a bad thing after all. I mean, if things got too busy in the team, I'd have no time to look after all my dads in the guild, would I? Yeah... Yeah, things are fine the way they are.
Grand Master Varka... Whilst I understand his disposition, I can make no sense of his actions. ... I—I've said too much already. I've long since left the Knights of Favonius. Forget I said anything.
Grand Master Varka is the legend of his generation. On the day of his triumphant return, I shall be sure to personally introduce you to him. I'm sure you too will be in awe of his greatness.
Now that you mention him, it is a shame there is no-one in the Knights of Favonius to inherit the Grand Master's approach to his work. Sigh I must say I really do appreciate people like him.
At first I wanted to join his expedition party and do my part as a maid. But the Grand Master said no — it would give him more peace of mind if I stayed behind to take care of things in Mondstadt. It made me so happy to hear how much he values me! ...Okay, so apparently he said the same thing to a lot of people. But that doesn't change the fact he prizes me too!
Varka? Just the thought of one day going head-to-head with him in combat, the fabled Knight of Boreas himself, titan of the Knights of Favonius... It makes me buzz with excitement. It's a beautiful life we live in this world.