Dorian Tyrell was a Mafia mobster who became embroiled in the plot of the Mask movie when the woman he was using as a mole - Tina - was witnessed by him in an intense dance with a Mask-wearing Stanley Ipkiss. Ipkiss, wearing the Mask, then foiled a robbery that Tyrell's men were trying to undertake, which only served to enrage Tyrell more. Fascinated by the Mask's power, he eventually got his hands on it and became a far more malevolent being than the cartoonish fun-loving Mask character Ipkiss became when he wore it, and he used its power for evil. Just as he was about to kill Ipkiss and essentially "win", he was stupidly tricked in to giving Tina "one last kiss", for which he took off the titular Mask and ended up being defeated. Seriously, Tyrell? The old "falling for a lady's charms" situation? Dumb!