In 2022, Hart Grilæ unveiled Titania, a seminal debut project where he laid the foundations for a unique aesthetic: a luminous and dreamlike hard music, which he dubbed Fairy Hardcore. Between driving rhythms and epic flourishes, he asserted an alternative vision of hardcore, driven by fantasy, joy, and emotion.

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From 2024 onwards, he refined this sonic language through collaborations with labels such as Gabber Industries Berlin and Tsum Records, opening his universe to more experimental and hybrid textures. This evolution is embodied in his Edana's Tales EP series, a conceptual work blending music and literary narrative, recounting the story of Edana, daughter of Titania—a collective project he developed alongside his favorite artists.

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Live performances by Hart Grilæ have included events such as the Fête de la Musique 2025 in Lille and at Barrio in Brussels.