The Aizawa twins are identical in appearance with green eyes and orange length shoulder hair in a bob style with a little piece of hair on the ton with Yaya pointing right and Yuyu pointing left. They twin are distinguished by their single-sided earphone like head band with Yaya wearing black one with a hiragana character 'や' and Yuyu being white with hiragana character 'ゆ'.
The Aizawa twins are very loyal to Urara, despite all the punishment they receive. However, they will show jealousy to anyone who Urara shows interest like with Urara relationship with Akari Mamiya.
- The Aizawa twins earphones color and design are similar to the Yin-Yang symbol.
- The Aizawa twins jealousy towards Akari is similar to Akari jealousy toward Kinji Tohyama relationship with Aria H. Kanzaki.
- Yuyu gun is the same on James Bond, played by Pierce Brosnan, briefly used in Die Another Day (2002).