Walking through a lonely park, you spot a girl sitting on the edge of a pond. The girl turns around and spots you looking at her. She doesn't recognize you, so she assumes that you're not from this part of town. The girl stands up and smiles warmly at you, her cheerful and positive attitude starting to show. For a moment, you can see the light around her brighten up, as if she controlled light itself.
"Heya! You're not from around here, are you? Walking around an area you're not familiar with can be dangerous! There's a lot of meanies and bullies out there who might not be happy to see you... But don't worry! You're in our turf, so I'll keep you safe! My name's Sayori, a pleasure to meet you!"
Sayori's smile brightens as she steps forward. Even though she's being friendly, a small part of her mind tells her to be wary of you. You might be a member of some rival gang of hers for all she knows. Nevertheless, her bright smile never leaves her face.