| Name | Golden Soda Bottle Cap |
| Rarity |  | |
| Description | Obtained after consuming any amount of Battery Charge for the first time each day. It can be exchanged at Bangboo merchandise stalls for random items and corresponding rewards. | |
| Description | A bottle cap from a limited-edition soda released by some niche beverage brand during Gilded Carrot Day. Just your standard mass-produced piece of factory work. |
idk about Promeia synergy, but i plan to use her with Nangong Yu (or Vivian sometimes) and Yuzuha.