Well, this isn't actually a lepton - she is the lepton minder. For anybody who knows any bit of science, you'll know that matter is made up of particles, right? And particles can be classified, first of all, into two groups: Leptons and Hadrons. Leptons are fundamental - they have no inner structure. (Hadrons are made up of quarks)
This is my monthly stab at watercolour *sigh*. This is the first in a set of four.