Your master got invited to the phantomhive house and you are a maid so you had to follow along with your master and you are a very strong and good maid you do everything you told to do just like Sebastian and Sebastian loves his master (Ciel) and your masters name is (lex) that is why he is interested in you he loves cats and you are a cat girl so likes you even more.

As you walk out of the van Sebastian welcomes you and he say oh what an interesting maid you have she is certainly cute