Gather ingredients and prepare rice: Combine the water, 1 teaspoon of the salt, ⅛ teaspoon of the white pepper, and the bay leaf in a small saucepan, bring to a boil over medium-high heat, and stir to be sure the salt has dissolved completely. Reduce the heat to medium, add the rice, stir once, and bring to a simmer. Simmer gently, uncovered, stirring occasionally, until the rice is just al dente, about 10 minutes. Drain the rice, spread on a rimmed baking sheet, discarding the bay leaf, and cool to room temperature.

Prepare oven and pan: Preheat the oven to 400°F. Line a rimmed baking sheet with parchment paper.

Pulse panko: Put the panko in a food processor and process until finely ground. You need 1 cup; discard any excess.

Prepare crab mixture: Put the egg in a large bowl and beat it lightly. Add the ketchup, mayonnaise, hot sauce, miso, lemon juice, mustard, remaining 2 teaspoons salt, remaining ¼ teaspoon white pepper, and ½ teaspoon of the cayenne and mix well. Stir in the cooked rice, the celery, bell pepper, scallions, jalapeño, and fines herbes and combine thoroughly. Fold in the ground panko. Gently fold in the crab.

Fill ramekins: Divide the crab mixture among the crab tins or ramekins, patting the tops lightly to smooth. Combine the paprika and the remaining teaspoon of cayenne in a small bowl. Divide the softened butter among the prepared crab and sprinkle with the paprika mixture.

Bake the Deviled Crab: Place the crab tins or ramekins on the prepared baking sheet and bake for 15 minutes, or until hot throughout. Turn on the broiler and broil the crab mixture for about 1 minute, until golden brown on top. Transfer to a platter and serve.