Added Witch Hunt's translation. I don't know how to change it to red so it would be nice if someone else did.
I personally wouldn't have it without the text as it's part of the climax of the scene, her last words AND part of the last riddle of EP6.
By the way there's a tag for this very line/scene on pixiv.
Nice to meet you, hello! I am Furudo Erika, a detective!!I may be an uninvited guest, but please welcome me!!I am the visitor, the eighteenth human on Rokkenjima!!!