Roland, known as Isono in the manga and Japanese anime, is one of the Battle City tournament officials. He appears to be Seto Kaiba's right-hand man and business advisor, as he appears later in the anime series to help Kaiba manage KaibaCorp. During KaibaCorp-sanctioned tournaments, he also serves as the MC (Master of Ceromonies).
In the anime, he is known for insisting a duel continue regardless of the situation (of course, this was due to KaibaCorp regulations). This was a running gag throughout the series. Often, he would continue talking about the duel, when there were bigger issues at hand. Tristan Taylor and Joey Wheeler were aggravated because of this.