My first attempt at posting photos on TTV… Ladies and gentlemen, here’s my self-moc 
Toa Gua, Toa of Acid
The only known Toa of Acid in the Matoran Universe. As his creator saw no use for a Toa of that element, he was stationed on the distant world of Taulou Nui immediately after his creation. Being a friendly (if slightly eccentric) individual, he befriended the local Matoran, as well as the only other Toa on the island. To this day, he has never learned the true identity of his creator.
In battle, Toa Gua attacks in a whirlwind of colors, claws and blades, with little to no control of what or who he hits. However, this unpredictable fighting style has helped him win many battles and become a respected protector of Taulou Nui. The effectiveness of his attacks is further improved by his Kanohi Sellemen, the great mask of randomness.
Color scheme was very much inspired by/lifted from one of my favourite Drome Racers, 4590 Flash Turbo!