Security Chief Hannon is extremely aggressive and by-the-book, and he wishes his vault security force was a real military with a war to win. He is not nearly as smart as he thinks he is, and his men are not nearly the crack security force he thinks they are. Spit and polish are everything to him; following orders is his highest calling.
It is likely that Hannon will attack the player during Escape!, though his attacks are not severely damaging and can be ignored as the player progresses through the quest, should they wish to keep him alive.
If the player does not kill him during Escape!, he will be present during Trouble on the Homefront. He can usually be found patrolling near the Overseer's office. If spoken to, he will blame the Lone Wanderer for the death of his wife and son during the chaos of the breakout incident, but will not attack unless provoked. He dislikes Lone Wanderer so much he thinks about putting him/her on a pike - at least he says so.