PARIS — Matthieu Blazy’s sublime haute couture debut at Chanel had its unlikely roots in Japanese anime. The designer was struck to his soul by a haiku he came across. Bird on a mushroom. / I saw the beauty at once. / Then gone, flown away. “It was so poetic,” he mused during a preview. “Considering what’s happening around us every day, I thought maybe what couture can offer is a kind of parenthesis, like a dream, even if we manage a 20-minute escape and just throw poetry on the…

