June Darby is Jack's mother and is one of the only adult civilian humans to know of the autobots. She was initially unaware of the Autobots' existence for long until she was targeted by MECH and Airachnid. She was saved by Jack and Arcee and told the whole truth, after which Jack and Arcee took her to the Autobot Base to meet the rest of Team Prime. June also revealed to Arcee that Jack's dad left them and that is why she's overprotective, fearing she might lose him too. She also seems a bit too focused on things being 'normal', even when the circumstances obviously throw normalcy out the window.