This quick kick pits one's Fitness and Athletics against an opponent's Insight and Danger Sense; if it connects, it will cause one point of damage to the target.
This ability is gained during Character Creation in the last section (Did something happen along the way?) when choosing the option "Familiar Training: Battle Angel" which costs 2 points.
The Ability is listed under your characters abilities, so both you and your Familiar can use it, possibly in close range Duel or during adventures and encounters.