morinaka kazaki (1st costume)
The first and original default costume of Nijisanji's Morinaka Kazaki, as seen in post #3547394 and post #4132904, which she used from March 2018 to August 2019 when it was replaced by a new default costume. Both this and her following default place her default age at 10.
It consists of a pink, striped hoodie with a bear hood and fake bear claws, pink shorts, and pink, striped, bear paw-themed footwear.