Irene Schulz
Doctor Irene Schulz was a human physicist, described by Dr Leon Perkins as the "foremost expert" on temporal physics.
She and Dr Perkins travelled in time using a prototype vortex manipulator, of their own creation. On their first test run, however, they were pulled off course, and materialised in the Hoarder's inner layer. The Hoarder decided that they were both his property, and took their future great-grandchildren as hostages. Schulz and Perkins were tasked with acquiring treasure for him, as well as hunting other children to further the Hoarder's grander extortion scheme. Though they brought back many valuable objects, both refused to acquire any living beings for the Hoarder. They were summarily punished.
Together they were tasked with procuring a painting from 1899. By mistake they travelled to 1999 and took the painting from a small museum, bringing it back to their client in exchange for a shot for Dr Schulz. (COMIC: A New Beginning)
She and Perkins later joined the Time Agency. (COMIC: Hidden Human History)