Nice to meet you, Anna! Thanks for the welcome. =)
Third tier Pureblood + vulgar mouth definitely put her on Isadora's shitlist but you are right, this will be fun. I'm sure all Isadora can think of is how to give this girl a life makeover when she talks to her.
As for the other two, they are unimportant to her but that doesn't mean they won't be seeing each other in the journals!