Buddha reminds me so much of Majima from the Yakuza Series if you take out Majima's obsession with Kiryu. A free-spirit, yielding to no one, challenging everyone who gets in his way.
I mean, buddha fighting for humans and loving humans makes sense, since the gautam buddha was a human who gained enlightenment. Further upsets I can think about from the god's side might be Sun Wukong, Loki and Prometheus/Pandora if he/she show up.