V1.0 Illustrious:
For appearance add "thorkell, beard,"
For clothes add "chainmail armor, belt, headband, short green sleeves"
PonyXL:
For appearance add "beard, (yellow eyes:1.15)".
For clothes add "chainmail armor, belt, headband, short green sleeves"
For eyepatch add "eyepatch, scars".
Sometimes for better results you may need to add to negative prompt "(bara, weapon:1.2)"