Wendy Daniels is the daughter of Forget-Me-Not and MeMe. Neither were ever given real names, but for a brief period Forget-Me-Not went by Jared Daniels and he called his daughter Wendy, which presumable might have been a relative or MeMe's real name. Her father died when she was young, and she was found by Betsy Braddock and put into foster care before being sent to New Avalon Academy, where she was under the care of a guardian (ANYONE, ANYONE!??) and staying on later in a janitorial aspect.
Wendy has imperceptibility. This means, basically, that unless you are looking directly at her - you do not see her and you do not know who she is. In fact, even once you have looked at her, meet her, the second you turn away from you you forget who she is or that you have ever met her. She is difficult to detect through machinery and only strong telepaths will sense her presence.
This means that her largest mode of communication is electronically, as what she types and posts are not forgettable. This gives her, at least in the Network and some of the community, the ability to be recognized. So while you may not remember if you have ever interacted with her in person before, you will have an inkling of who she is based on how often you have seen her posts or spoken with her via the Network/Text messages. However, all in-person interactions will be forgotten. Only people who have consistently interacted with her over a number of years will be capable of remembering her. They can remember of her when they are not looking at her, and when they see her again, remember the other instances in which they have seen her. The in-between is still fuzzy but not as much as people who have just met her. The same applies to the touch-exception below.
She does have a secondary part of her ability, largely influenced by her mother, which allows her to implant memories of herself into people. So all those gaping holes in your memory where you interacted with her but can't remember? When she touches you, she can transplant those memories back into you and fill those holes. The more she does this, the more likely you are to remember those instances even after you stop looking at her. This still takes quite some time.
Plot wise, she is connected to Nigel Braddock - who she deems a friend after meeting him when Betsy found her, and who's ability inherently negates hers, and Alexander Deeks, whom she was in foster care with and is one of the few people who has any recollection of being with her. I am looking, however, for one or two other characters in game you want to forge close relationships with, who will remember her.
I am also bringing in one or two more characters because I AM SRSLY INSANE and hope to plot with more of you later / fill more of your lines (hit me up i love filling lines).