I think this weapon is reference to Utawarerumono and Kagura. But I might be wrong.

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NerDeath said:

I think this weapon is reference to Utawarerumono and Kagura. But I might be wrong.

No I'm certain it is a reference to Utawarerumono.

If you guys are referring to the sword pose. It's way-way back to Gundam series.

T34/38 said:

If you guys are referring to the sword pose. It's way-way back to Gundam series.

Silly kid. Anything that Obari touches will have this style. Not that you're wrong, though, but that pose has been around since the 1980s - long before SEED

Brave Perspective / Brave Stance / Sunrise stance originated in early 90s anime Brave Exkaiser and then turned into a popular theme in plenty of Surise's mecha series, and then into a meme.

T34/38 said:

If you guys are referring to the sword pose. It's way-way back to Gundam series.

Not the pose. The weapon itself.