Peggy probably isn't one of those that remembers her from anything other than the network. In person it'd be like 'I meet a lot of people, but I'm usually good with faces I swear...well now I feel kinda shitty...'
Cara is the one of mine closest to her in age, but they probably didn't overlap at NAA much since Cara got out a year early so no real high school overlap. She's a shield agent so she'd at least appreciate some of the things you could manage with a power like that, even if it has more shitty than good sides. She's shit at small talk so if you had to go through countless versions of bad smalltalk with her...XD But her line of work and all, she likes knowing things nad being aware of her surroundings so having someone who's power is to literally go against that is a little unnerving, but she'd make an effort to keep in mind that there's a forgettable person around.
Aleks is a nice dude, so if he sees her in the hall he probably smiles and says hi and asks if she's new here....and repeat this interaction like 50 times. My god that must be annoying. She probably posts enough online that if she says 'Wendy' each time he'd have a pause then 'oh yeah, online girl I've never met but apparently I have! Sorry about that.' Then again repeat THAT interaction 15 times over... XD Recently he's been holed up in his room so she wouldn't have seen him much, but for most of the rest of the semester he was around.
Cliff is probably the one she runs into the most, him being a student and all, and he probably registers her the least. Since he's usually on his way to class, running by, or if his powers are having a really awful day...hiding out somewhere. He likely thinks she has a shit power and thinks that sucks, but also thinks it wouldn't be an awful power if she could turn it on/off.