It honestly depends on the individual. Usually Mars RX won't even be noticed much, perhaps some agitation. As for arguments, it may have been aspecting your natal Mercury.
You can do a working for peace and harmony among the people in your life, such as using Green energy in your home, or invoking Green energy into your aura before meeting with friends. Sananda (sanskrit for joy) will also be useful in the home, workplace, etc.
If the person is into spirituality, you can guide them to breathing exercises, yoga, etc to raise their energy and aura cleaning.
If they're not, you can clean their aura for them. I did that for some years for my loved ones. But there's only so much we can do for others. Some basic sweeping of light is easy enough and helps overall, and doesn't take much time.