Team Dad: It shows especially when Lagerfeld comes to kill Zephyr, how Vashyron feels about his companions; acting lightly at first, when Lagerfeld invokes a friendship between them thinking that will give him the boy, Vashyron snaps and blocks Lagerfeld from coming in.
Jerk with a Heart of Gold: Despite his sociopathic tendencies, Zephyr leapt without thinking to save Leanne at the risk of his own life, offers her his jacket when she looks cold, and risks his life to retrieve her cold medicine when she gets sick.
Anger Born of Worry: After she saves Zephyr from being killed by Lagerfeld, she slaps him upside the head and berates him for wanting to die... before breaking down in tears and pleading with him to at least "die with courage" while clinging to his back.
The Chick: Though definitely not the passive version.
Driven to Suicide/Interrupted Suicide: The first time you see her in a cutscene, she's jumping to her doom, only to be saved by Zephyr. Later in the game, we discover that she did so because she believed she was about to die anyway and wanted to do so on her own terms.
Gameplay and Story Segregation: Both Vashyron and Zephyr mention repeatedly that Leanne is the New Meat and highly inexperienced compared to them. When she gets in an actual fight, however, she's just as skilled and capable as they are.
Kicking Ass in All Her Finery: Her default◊ outfit is a dress that looks a bit like a winter coat with knee-length boots complete with stilettos and a nice ribbon at her neck. And she kicks serious ass while wearing it.
Magic Skirt: Averted and played straight. Leanne's outer dress (or possibly coat) does ride up with all the flips she does, but there's another skirt underneath that that doesn't seem to budge. Outfit B averts this trope but some of the outfits in B have a pair of black leggings on her. Some don't.
New Meat: As noted above, she's considered the least experienced member of the team; and it's implied that she only recently (as in, a year after she moved in) started accompanying the other two on their missions.
Your Days Are Numbered: The reason for her attempted suicide at the game's beginning. Leanne was one of twenty newborns who Sullivan experimented on and programmed to die at a certain birthday; Leanne herself was supposed to die on her twentieth birthday, so she decided to kill herself, preferring to die on her own terms. However, Zephyr intervened, and when the clock struck midnight, she didn't die.
Your Makeup Is Running: Exploited; she says she wears makeup as a reminder to stay strong, because if she cries, she'll ruin the makeup.
"I'll set my doubts aside. I'll set them aside to build a world of order. For the sake of the people."
Mind Rape: Her current mute childlike self is a result of Zenith doing this to her.
One Woman Army: A few years prior to the game, she invaded Basel with the goal of wiping its people out. She killed the entire Lucia excavation team, including Victor, and was about to kill Vashyron when Zenith intervened and broke her mind.
Pet the Dog: It's pretty obvious from the ending sequence that he genuinely cares about Rebecca.
Well-Intentioned Extremist: Arguably applies to him too as he is also following Frieda's ideals albeit in a different way. While Rowan's goal is to control Zenith to prevent it from spontaneously killing people, Sullivan's goal is to free people from it entirely by making them like Rebecca. He eventually succeeds in making himself free but along the way Crank Seminary (among most of the plot) happens.
"I'm alive! You all saw it, each and every one of you! I've been chosen by God!"
Chekhov's Gun: In his first scene, he is given his quartz stone, which he fashions into a ring. Later, he punches out a monster threatening Leanne while wearing it, causing the ring to shatter. Pater dies.
Reasonable Authority Figure: Seems like a real nerd at first, completely and totally awkward. But one soon learns that he deeply cares for the common people and is devoted to clearing out areas so they can have places to live.
A close contact of Vashyron, Cardinal Theresa often gives missions to him and his team.