D is for Devious
Hakkai is devious. He never quite says anything, making his point subtly and indirectly. He loves to manipulate Gojyo into things, relishes in confusing him at every possible moment, loves to play poker, because Gojyo's pouts are entertaining, enjoys keeping him off-balance, their game of parry-stroke-parry.
Gojyo, too, is devious. He lets Hakkai manipulate him, because it gives him so much pleasure; whines, wheedles and teases because it makes that pretty face come alive; banters, because that makes Hakkai's eyes dance; if it makes Hakkai smile, he doesn't mind losing poker games and pride forever.
Forever. Yeah. That sounds nice.