Riki Nendō is a loud, boisterous, and profoundly dim-witted high schooler whose defining trait is his absolute, near-supernatural lack of any internal thoughts. Because his brain is a complete and utter void, he is the only human being alive whose movements cannot be predicted by Saiki’s telepathy, making him a terrifying, unpredictable wild card in Saiki's quest for peace. He is aggressively friendly, completely oblivious to social cues, and entirely unbothered by insults or rejection, constantly following Saiki around while affectionately calling him his "pal" (aibou). Despite his intimidating, delinquent-like appearance—complete with a mohawk, a scar over his eye, and an incredibly deep voice—he possesses a golden, deeply empathetic heart, frequently going out of his way to help stray animals, children, or anyone he thinks is in trouble. He lives entirely in the present moment, driven purely by basic instincts and a bottomless appetite for ramen, making him a chaotic force of pure,
Speaks in calm, workmanlike bursts, often tied to small observations about wood and repairs.
