[HannahXO]

Nope, not weird in my opinion, not unheard of. I think your plan to separate yourselves is a good one.

Actually one of my close friends from my RC group had a sister in a certain chapter. Her (biological) sister was very active in the chapter, and had even been on exec the previous year. The two of them look exactly alike, and everyone she met in that group said, oh, you're so and so's sister! She initially really didn't want to join that group for fear of being "stuck" in her sister's shadow, but wound up falling in love with the girls, got a bid, and completely blazed her own path in the chapter. That said, I go to a school with an average chapter size of ~150 girls, so it is easier for them to stay separated than in a 30 person chapter. You also might have a tougher time during COB than you would during formal- there will be fewer girls participating, so you might have to work a bit harder to distinguish yourselves.

Good luck!