One concept: Just because one is getting beaten doesn't mean they are the victim. One does not necessarily know the history of the members of the fight/beat-down. But as to a method of intervening. Go to the so-called victim, help the person up. Escort them away. Chin-Na as required/capable to release the person. Blocking and directing to advance to the person. Once in contact use self-joint manipulation to avoid attacks or to cover the person one is assisting.
Positionings, layering muscles into Ernie Moore Jr.'s Kung-Fu, Squirrel's, Body Armor. Like paper sheets one upon one to form a stronger one then one upon them to form a stronger one...One might suppose it could be referred to similarly as the One...or as Two.
Defending as needed, escort the apparent victim while taking hits so as to not jerk the so called victim.
By the way, it's not about winning per se. It's more about doing as much as you can while being comfortable-ish.
I No_Know