In Jain Dharma, ahimsa is supreme. So the ideal response is not to retaliate with anger or violence.

If someone is hurting you physically, the Jain approach is:

• First try to escape, avoid, or stop the harm without harming them.
• Use the minimum necessary force only to protect life and prevent immediate injury, especially for a householder.
• Do not act out of hatred, revenge, or ego.
• If possible, seek help, withdraw, or restrain without cruelty.

For a sādhu/sādhvī, the vow of nonviolence is extremely strict, so they do not fight back. For a lay Jain (श्रावक/श्राविका), protecting oneself is generally accepted only as a last resort and with the least possible violence.

The inner spirit should remain:

• compassion
• self-control
• forgiveness
• no revenge

So, in short: do not “fight back” in anger, but if immediate danger exists, protect yourself with the least harm possible.