I really love the theme of foster fathers in OP, how Oda shows
children are not guilty of the sins of their fathers (or even mothers too ofc, especially Big Mom) nor do they have to be like them and that your true father, your best father doesn't have to be your blood father but someone with no relation to you, someone who just really cares about you and would even literally die for you. It's genuinely enough to make you cry or at least it does for me, as I can really relate to having to having no father and a shitty father when he was still around willingly too.



Rocinante is legit one of the best characters in OP and some fathers can still be great too towards their own children such as Senor Pink and Oden ofc. Even if it's in hindsight for Senor too ofc.
Between what Oda does and the Guardians of the Galaxy films did wonderfully with Star Lord and Yondu, it's really wonderful to see foster fathers get love like this:
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I can definitely see that happening, him vowing and thus trying to protect Robin especially but also maybe Luffy and even the whole crew ultimately? Aokiji has a really good heart deep down, FIlm Z did such wonders for his character too.