Homer Pinkerton was a professor who helped create the Memory device that allowed Spectrum to remove specific memories and replace them with harmless ones.

He lived down the street from Ruby and took care of her when she was young.

He hid the location of the Mars mushrooms in her eyes, meaning that whoever needed the location would have to find Ruby first.

He was dead before the start of Ruby Redfort: Blink And You Die, and was possibly murdered by the Count or Casey Morgan.