Open the “scripts.fs” file in the Data folder of the game with any hex editor.
Find offset 0000609C
Then the code
30 2E 33 2C 6F 00 FF 36 36 2C 20 31 2E 32
change to Code
30 2E 30 2C 6F 00 FF 30 30 2C 20 30 2E 30
The character will become invulnerable.