The third angel Sherlock met was a timid morgue technician by the name of Molly.

As angel's went she wasn't high up in the rankings ladder, indeed she was more or less a gentle-looking ferryman, she was masquerading as a mortician solely for the purpose of encouraging lost souls that didn't want to move on from their bodies to go into the afterlife.

While most people saw her as a weak girl who let Sherlock walk all over her, in fact any corpse she did loan him, was only parted with once she was sure the soul had moved on.

Sherlock learned the hard way what happened the first and last time he tried to borrow a cadaver with it's soul still attached.

She, like Lestrade and Angelo, were very much into the not killing unless necessary, that didn't stop her from zapping him hard enough to see stars and leaving him with blisters in uncomfortable places that didn't disappear for a week.

He never asked her again.