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)"