Blu-Ray's Links
Upon their first meeting, Blu had found Akira in his larger form. Blu-Ray originally had followed Akira thinking that he would be able to protect him, but upon finding out that Akira was tinier than him the uchikomimi had already developed a liking from the kindness displayed by the kimonomini. Thus the loyalty kept Blu's attachment to the small creature and they continued to bond in friendship!
Akira didn't know what to do with Blu-Ray upon their first meeting. He was confused when the creature decided to follow him, but humored it anyway because he thought the uchikomimi was adorable. The hacker decided to keep Blu-Ray as a sort of mascot and personal image for his viruses and programs, thus became his handle name "Blu Sil3nc3" named in conjunction with the name he bestowed to the uchikomimi "Blu-Ray".