Lumière

Lumière (ルミエル Rumieru) is a character in KiraKira☆Pretty Cure A La Mode. She is the ancient Pretty Cure who lived in Ichigozaka in the past. She worked as a patissière to bring smiles to people's faces.

Lumière is only seen to transform once, in episode 32. It appears to be a shortened version. Lumière shouts "Cure À La Mode!". Her hair has suddenly grown long and turned pink, and her clothes have turned into a multicolor-glowing short-sleeved dress. Her hair is blown upwards and the dress turns into glowing pink foam. The foam grows, then bursts away into multicolor sparkles, revealing her Cure outfit and staff, and her hair settles down again.

(Source: Pretty Cure Wikia)