^^ I assume you're referring to Criticals. In which case that's not true. Her Critical does knock enemies into the air, like everyone else's. You just need to cancel an enemy action with it, or use it after someone else's Critical/Combo.
"You can plainly see why I'm a Boss character, and not some thug" - Kanon
Viper is right that "Counter Skill" knocks foes in the air for all playable characters late in the game. But I never tried to equip the counter skill on Hect though so I'm not sure bout that one. Nice tid bit of information to test later though. Thanks.