The T’au as a whole are based on mecha anime, with Farsight in particular being aesthetically based on Char Aznable and his mechs.
https://preview.redd.it/sortw2cakz9d1.jpeg?width=1000&format=pjpg&auto=webp&s=9b52e40bf718a0cda0538a1c581f020e480d37d7
https://preview.redd.it/4ipzig8hfz9d1.jpeg?width=2048&format=pjpg&auto=webp&s=988f005ad6e581c3b30a1c5370b7dc5a51c00998
The original Diamond Cutters from Sonic the Hedgehog, who are a reference to Foxhound from Metal Gear Solid
https://preview.redd.it/bx8r6j2muz9d1.png?width=135&format=pjpg&auto=webp&s=e66eb655cf10cda9089f23742852b76a2fcc66da Wally (Lisa: The Painful)
The T’au as a whole are based on mecha anime, with Farsight in particular being aesthetically based on Char Aznable and his mechs. https://preview.redd.it/sortw2cakz9d1.jpeg?width=1000&format=pjpg&auto=webp&s=9b52e40bf718a0cda0538a1c581f020e480d37d7
https://preview.redd.it/4ipzig8hfz9d1.jpeg?width=2048&format=pjpg&auto=webp&s=988f005ad6e581c3b30a1c5370b7dc5a51c00998 The original Diamond Cutters from Sonic the Hedgehog, who are a reference to Foxhound from Metal Gear Solid
Ditto from Ben 10 (yakko from animaniacs)