Hallufox review
Hallufox puts a library of fictional AI characters beside a character creator. The public cards include short descriptions of who the characters are. I'd read one of those before starting a chat so I had something more specific to say than hello.
Choose a premise before opening the chat
I could start with a card that gives the character an occupation or a setting, then use that detail to open a scene. Hallufox's terms also describe making a character by choosing its attributes. Smut AI Chat is a different option when I want to steer the exchange as a draft and export the parts I wrote.
Read the terms before bringing in your own material
Hallufox lists image generation separately from character chat. Its terms describe a license to use material you submit for purposes including running and improving the service. I'd start with a new fictional character and read the current terms before adding material from a project I wanted to keep to myself.
Anabel’s take
I'd choose one character card with a clear premise and try a short conversation. If I found myself wanting to rewrite the character's background, I'd use the creator to give that scene its own cast.