Maybe she is an ambassador from a fairy or pixie dimension negotiating with Chris ahead of the final stages of the merge?
In seriousness though, she might just be an odd autist who followed Chris for years and happened to also have a hobby of writing to prisoners.
That way she would know how to get in touch with him inside.
Autism could also explain her public behaviors.
She might just be extremely shy and not want photos or interactions with strangers because ‘tism.
Many women autists are like this, but it’s just one of the many things not really noticed as unusual about autistic women, because shy demure women don’t raise eyebrows particularly.
Not every autistic is a lunatic motherfucking troon, or goes around with a dog and a Star Trek script.