I'd go Sorlock rather than straight Warlock. EB becomes Venus's Crescent Beam Smash. UA was a light-themed patroness option. Tomelock lets you pick up some easy at-will abilities...a slightly reflavored Thorn Whip could pass as a Love-Me Chain, for example. The rod casting focus becomes a henshin stick pretty easily, just under a different name. Sorcerer has limited choices, but those would feel like the powered up abilities that only get busted out once or twice an episode. Just stick to a specific theme when picking out those spells and handle the rest with flavor, not crunch.