[Aoi Kurenai]

This one is a pretty tough choice for me and the answer is probably boring, but I love the Zyuranger suits. They've got a great use of shape and color that creates one of the most solid looking suit designs in Sentai history. There might be some nostalgia going on here, but I'm always taken by the suits when I rewatch the show. The sharp lines break up the colors without needing to be very loud or filled with little design quirks to give you something that feels like it has body.

Other suit designs I love are the Kyoryuger suits, they're loud and bright but done in a very appealing manner. The Dairanger suits, there's something about them that really makes them stand out and go great with each member's individual style of fighting. Finally, I love the Kakuranger suits, they are one of the very, very, very few times I think Sentai has managed to absolutely nail minimalism and I remember being shocked that, for an entire year, these were the main look for Sentai.