Lily

The genius of the group who wears the same school outfit throughout the anime. She has blueish dark green hair and also wears glasses, and wears brown School shoes with white stockings and a Pleated Checkered skirt with a brown Knit Vest. in lilly's past she was rejected by her classmates. Lilly speaks little, but when she does, it is usually to make a joke comeback in response to Millie and Ellie. Her medium is her glasses that she usually uses to help navigate them through the group's travels, amongst other things. Her Guardian Ghost is a roborovski hamster named Jangurian, merges with Lilly's glasses become binoculars. from wikipedia