The armour which references internet meme kek. In a new blog post, Bungie said the armour had been designed in June 2015 and so it had missed the meme's more recent, "vile" connotations.

Bungie said that the artwork wasn’t designed to emulate the “kek” meme. Bungie has a team dedicated to reviewing content for “cultural, geographical, and other sensitive issues.” ...

"Unfortunately, that review was conducted to explore whether or not we were comfortable with the connection to the original, innocuous 'kek' internet meme. The more contemporary, vile derivation ...

a catch-all ism that can invoke the power of Kek via “meme magic.” All those Trump/Pepe memes you saw during the 2016 presidential election? That was trolling, but it was also the Cult of Kek ...