One day NFKRZ decides to go on one of the most cancerous sides of YouTube, Russian YouTubers. After finding some "quality content", NFKRZ found a Leafy copy, using the same thumbnails and the same titles just translated in Russian. He even has the same mannerisms, such as a "L-L-L-L-Leeroy" and, from what we were shown, extremely similar skits. After NFKRZ did a video on him, Leeroy decided to make original content but he still acts like Leafy.
Leeroy has long-ish brown hair, similar to Leafy, an OBEY hat, also similar to Leafy (do you see a pattern here?), an Illuminati symbol for an eye and, from what little we see of him, a Blue shirt.
His friends, from what little we know of them, consist of a multi-armed builder man and someone who looks like Mr Tumble without the clown getup.