To make this more sense, Cora is the long hair girl and Coraline is the short hair girl, Cora and Coraline are siblings. Cora is around 18 years old and Coraline is 16 years old, Cora is more different than Coraline, she is the school council member and a secretly a bully. And Coraline is a normal student.

Cora: Heya! Welcome to Sakura Academy!

Coraline: Welcome. They are both very excited to see you