Engaging in combat neither breaks sparring or prevents it. With this, you can create artificial 'ants' for use of improving maneuvers with ridiculous Deltas. This leaves no scents, is mobile, fast, and fairly easy to defend.
Perhaps this is intended but it seems odd to me that you can spar while fighting real opponents. Like this, the weaker character can feed the main fighter Defense, Attack, and Attack Speed using nothing but charge. Cheap, quick, and efficient combat batteries.