When Jesse and Cassidy are trying to save Tulip, Jesse asks for AB+ blood and Cassidy says they don't have any. If Tulip is AB+, then she is a universal recipient, and could accept any blood type without a problem.
When Jesse & Cassidy are trying to save Tulip, Jesse asks for AB+ blood and Cassidy says they don't have any. If Tulip is AB+, then she is a universal recipient, and could accept any blood type without a problem.