I’d skip the “deep, meaningful that represents blah, blah, blah” part. Just pick a cool image that you both like. Dragon, tiger, panther, ying/yang, skull, etc. 

Hey My siblings and I are thinking about getting tattoos together, but we're struggling to come up with an idea that’s meaningful and unique to us. We want something that represents our bond but isn’t too cliché. Ideally, the tattoo should be small, subtle, and something we can all individually appreciate. It could be a matching theme, a shared symbol, or even something more abstract. Does anyone have creative sibling tattoo ideas or personal experiences they’d be willing to share? We'd love to hear suggestions that are meaningful, cool, and not overly obvious!

Tattoos can take 4-6 weeks to heal, longer if they went in rough. Give it a couple of months.