Xander Hayes

Xander Hayes is the older brother of Penelope Hayes.

History
Xander was babysitting his sister, Penny, when she went missing during a game of hide-and-seek they were playing. The power also went out in their whole building, which is when he decided to call the police to help find her. Station 19 responded and started to search the building floor by floor. She was eventually found trapped in a washer in the basement. Andy wasn't able to free her and so she called for backup. However, while they were searching, a gas leak in the building had been discovered, forcing an evacuation. Andy and Sullivan sent everyone else out and then freed Penny and carried her out. They resuscitated her with difficulty before sending her to the hospital.

Familial
It took a long time for his parents to trust him to babysit his younger sister. The first time they agreed to let him, his sister went missing for over an hour. After she was found, she told him they'd never agree to let him babysit again.