Ritsu uses an attempt at diplomacy. 

"A-ah! Hi. Um, it's okay! We mean no harm! We just heard you singing at and it was cool, s-so... Uh..." 

Kelts sighs. [i]We need to work on your people skills, Ritsu.[/i] 
He turns back to the girl in front of them. [i]I hope we didn't disturb you. Your performance was quite beautiful. I'm Kelts, and these two are Alanya and Ritsu. They're not harmful.[/i] He points to each person respectively as he introduces them. Hopefully she would see that they came peacefully and wouldn't freak out, though he wouldn't blame her for being nervous.