Why Did Hamura Ōtsutsuki Separate From Hagoromo?

The way I see it, Hamura Ōtsutsuki is one of the keystone characters when you trace Kaguya's whole story — not just as her son but as the guy who helped make sure her reign of raw, godlike domination ended. Kaguya arrives on Earth, eats the chakra fruit from the God Tree, and becomes the first wielder of chakra. She gives birth to two children, Hagoromo and Hamura, and things go downhill fast when she transforms into the Ten-Tails and starts trying to reclaim all that chakra for herself. Hamura’s big role kicks in during that conflict: together with Hagoromo he confronts their mother, helps defeat the Ten-Tails form she became, and participates in the sealing work that ultimately imprisons Kaguya. Canonically, after the battle they split paths — Hagoromo stays on Earth to guide humanity and help distribute chakra, while Hamura heads to the moon (taking a portion of the responsibility and chakra with him) and becomes the progenitor of the lunar line. That’s why we get the whole ‘moon clan’ thing and characters like Toneri in 'The Last' who trace back to Hamura. On top of the fight itself, Hamura’s legacy is huge for later lore: his lineage carries the Byakugan and becomes tied to the Hyūga line, while his descendants on the moon are the ones who kept watch over Kaguya’s seal. For me, reading that confrontation in the manga felt like watching a myth split into two branches — one staying to shepherd humanity, the other going skyward to guard against a mother’s return. It’s tragic but also strangely noble, and it explains a ton about why the world in 'Naruto' and 'Boruto' still trembles around Kaguya’s shadow.

I've spent late nights scrolling through theory threads and scribbling ideas in the margins of a re-read of 'Naruto', and one thing that always hooks me is how fans remodel Hamura Ōtsutsuki into something far more complicated than a simple guardian archetype. Some folks paint him as a tragic idealist — someone who genuinely believed isolating the moon and watching over its power was the only way to keep people safe. That version leans into trauma: imagine witnessing Kaguya's descent and deciding that absolute vigilance is the only remedy. Others flip that into a darker portrait, suggesting Hamura's 'protection' was authoritarian, a preemptive control of human freedom to prevent any repeat of Kaguya's ambition. I like how that creates tension with Hagoromo in fanfiction; sibling rivalry meets ideological split, and suddenly both brothers are sympathetic and suspect. Then there are the more elaborate reinterpretations: Hamura as political actor, building myth and ritual to justify the Ōtsutsuki line's monopoly on certain powers; or Hamura as scapegoat in retellings where the real villain is larger cosmic entropy. These takes often draw on later material in 'Boruto' and the franchise's shifting lore, which gives fans space to reassign motives. Personally, I enjoy the ambiguity — the version where he wanted to save people but, in doing so, set up systems that silenced them feels heartbreakingly human to me.