Nico Robin haki kick color by xMrNothingx on DeviantArt

Rokushiki is better than haki : r/Piratefolk

Was Rob Lucci's Rokuogan an application of the advanced Haki that Luffy is learning now? - Quora

Rokushiki Robin 32-2 by Shinjojin on DeviantArt

List of One Piece Haki Users

Chapter Discussion - Rokushiki is based on Haki, Page 8

Rokushiki, A 0ne Piece Game Wiki

Konoha: Deduce Rokushiki and Armament Haki at the Start! Latest Chapter - MTLNATION

Queen of the Damned — I'm guessing that Robin does know some form of

ROKUSHIKI ACTUALLY HAKI POWER- Yaps, - Mugiwara Dangers

Chapter Discussion - Rokushiki is based on Haki, Page 5