Full Life Point, any injury will disable this skill.
"Another glorious day in the corps! A day in the MT corps is like a day on the farm. Every meal's a banquet! Every paycheck a fortune. Every formation a parade! I LOVE the corps."
Enthusiastic is an unlockable passive Ability. Once acquired, it improves Speed by 25%, right up to the point the Trooper takes Damage. To make this ability at least somewhat useful, one needs to Upgrade the trooper's dodging or Initiative capabilities, otherwise the ability won't be even noticeable.