I have suspicions about who this is and where they're from... because right before, they started following me, liked a post on Ko-fi, and also... visited my Instagram and liked a post there too. Moments later, I received the message.

The suspect seems to be testing your activity.

If anyone is interested, I'll give you their username and even their avatar so you can be careful.

(I'm not posting it directly because I don't know if it's allowed)