Since Wander's been here only a few days, he probably saw Charon sitting alone, pulled up a chair, and begin chatting away to attempt to start a conversation, and it might be what they usually do for now.

He's more pushy in the sense that his first instinct is to shower people in affection and comes off as annoying, mostly because Wander forgets that not everyone appreciates that. That's kind of his problem: He's pretty excitable guy.