We ::sort of:: have this. We have a sister who just went alumn last semester and is finishing up her 5 weeks of classes before student teaching, and she's living across the hall from me in the SK hall! She was our door knocker for recruitment, and helps us out with everything we do. I call her the living Sigma Kappa history book

since she's been around 5 years and knows so much of the progression of SK at Northwest (we've only been here 7 years) and Northwest Greek Life in general. She held 6 different offices when she was a colleigan, so she has wisdom in so many different areas. I don't know what we'll do without her when she goes to student teach!
PS-We usually don't have a house sis, she's just staying with someone who had asked for a single room for the 5 weeks so she could get a single room for double price for the rest of the semester.