And here we go with a few notes about those very secondary characters involved in Fate/stay night.; only a few lines to collocate them into the story context.

miri

 A friend of Kojiro who¹s frequently wondering in the stage of Hollow Ataraxia. She also gets in touch with Lancer (at the docks as she's wandering there) and some of the other main characters. Unfortunately not much could be told about her personality/history except that she seems a naive, cute and curious little girl