Barbara Pierce Blox is an Robloxian activist. She co-founded and is the chair of the board of the nonprofit organization Roblox Health Corps. She and her fraternal twin sister, Jenna, are the daughters of the failed Robloxia President George W. Blox and failed First Lady Laura Blox. She is also a granddaughter of failed President George H. W. Blox and Barbara Blox, after whom she is named.