Jane Crocker

First introduced in Act 6 of Homestuck, Jane is befriended in Volume 11 of Pesterquest.

Though she's the heiress to the largest baking corporation on the planet (and enjoys baking as a form of self-care), Jane's true passion is solving mysteries. She has a somewhat old-fashioned way of speaking.

Spoiler

Jane is an alternate universe version of John's grandmother, who, unbeknownst to John, is actually his biological mother.