Just to check, how many characters are sisters (related to the protagonist) and how many are bubbles (not related to protagonist)?
What's the bubble:sister ratio?
2 sisters, 1 mom, 1 employee, and then 2 guests which are sisters with each other. If you count them there's 4 to 2 in sister:bubble ratio
Got it. Is this the lineup?
Serenity, Sarah, Daniel, John, Beccy, and her sister are not related to us.
Emily, Emma, and Lisa are related to us.
People who are sisters are Emily, Sarah, Beccy, and whatever Beccy’s sister’s name is.