Alex gets all the presents today because siblings, omg.
Jessi and decided that Eve actually used to get stuck babysitting the McCoy kids at holiday parties. They would only see her like once or twice a year at most, but she was probably tons of fun and was briefly almost-famous at 16 (she won an MTV choice award, lol). BUT this is actually kind of a big deal for Eve because she has like 0 past connections with people. So mayhaps she's kind of a distant big sister figure? IDK, spitballing.
Caylie and Dean won't really know her; Dean's 2 years younger than Phil and went to school with him, so he also might know of her existence, but only in the vague way some guy two years ahead of you in high school might've said 'I have a little sister,' so probably not. XD
Vic and Mike both work at the school, but since Vic teaches seniors, she'll probably only know him as that bearded teacher with the giant puppy. (He brings Echo to class and walks him around campus all the time.) Plus he leads the Sentries now, so I think his visibility is rising. Mike's the dr, so he probably will have the most interaction with her. (PS, he can tell when you're faking, but he usually won't care.)