I've heard of schools that use older alums (mother types) for Rho Chis, as well as local alums of sororities not present on campus. There are many stories out there about Rho Chis who laughingly admit that yes, they did influence PNMs' choices or sneak off and call their chapters about certain girls so CPC was probably thrilled to have a great non-NPC woman as a Rho Chi.
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