after further examination it has been concluded that every myth and promise member has been depicted with a beret in something official
Low tier
>BaeAppears in a single emote as a penis joke
>MoriOne off l2d attachment for a poetry stream
>GuraAppears with a beret in a still image used in the Sorairo Days cover with Matsuri
>KroniiDepicted with a beret in the Promise 2023 Christmas acrylic stand
>FaunaDepicted with a beret in the Promise 2023 Christmas acrylic stand
Mid tier
>AmeliaAppears with a beret in the Dreamin' Chuchu music video, has also used this outfit in other streams (with the beret included)
High tier
>MumeiShe wears a beret in her casual outfit
>IRySShe wears a beret in her casual outfit and is also depicted with a unique beret in the 2023 Promise Christmas merch
God tier
>KiaraBig orange beret on her default outfit, if you've seen official art of Kiara there is a 99% chance you have seen her bright orange beret, also appears with a unique beret in the Snow Halation, also appears with a unique beret in the Aikotoba III cover MV, also depicted with a unique beret in a swimsuit drawing done by Ina, not only is she the only member with a beret on her default outfit, she is also the member with the most unique berets, making her the undisputed beret queen.
>InaBeret appears on her casual outfit, also appears with a unique beret in a promotional image for a ANIPLUS cafe in Singapore, also appears with a unique beret in Mori's youtube VN
Sources
Bae -
https://twitter.com/chrone_co/status/1605096568499032066/Mori -
https://youtu.be/pgIYpztWp60Gura -
https://youtu.be/2ys9IS5r9yAKronii -
https://youtu.be/4WaSJV_D0Ac?t=3144Fauna -
https://youtu.be/4WaSJV_D0Ac?t=3144Amelia -
https://youtu.be/vjBZzYN3aAshttps://youtu.be/ZYg0VmLfvBoMumei -
https://youtu.be/u5AsGbpU73MIRyS -
https://youtu.be/4WaSJV_D0Ac?t=3144https://youtu.be/xVKVYIjmXCUKiara -
https://youtu.be/uObh73QZUvghttps://youtu.be/FPzV-3vLRd8https://youtu.be/C5IIoZsci8Yhttps://twitter.com/ninomaeinanis/status/1330649462943875072Ina -
https://youtu.be/AVowcwLSjn8https://twitter.com/hololive_En/status/1715223820049530968https://youtu.be/FPGN6DfIaNc 