Penny is a female character competing in Open Source Objects.


Penny is a proficient college student dragged into the competition by her older brother, Coin. Pragmatic and curious, her strong suits lie in critical-thinking and logic, with a tendency to err on the side of caution. However, she’s affable and is naturally drawn to other people. She loves meeting new people and learning new things.


Penny is an orange, metal (potentially copper) coin.


Episode 1 - "Who the hell recommended Glowing Heart"

Penny makes her entrance by approaching Diamond and Coaster. She is impressed by Diamond's extreme skills, though she pivots and mentions that she was only competing because of her brother, Coin. When Crayon Box was offering a demonstration of the balloons, she ties one around Penny's leg.

During the challenge, she groups alongside Retainer, Incense Holder, Roulette Wheel, and her brother. However, as the gang lacked arms, none of them could help each other get down, pushing Penny to worry and fret. Penny, alongside the others, try to get the help of Organic Fruit & Grain Bar and OSO Novel, but she only finds true help with Dango. White Dango bites two of Penny's three balloons, sending her safely downward.

Episode 2 - "Your Opinion is Invalid"

After watching her brother get taken by Organic Fruit & Grain Bar, she herself gets taken as a partner by Sippy Cup, and gets put inside of her for the challenge. Penny stays inside Sippy Cup for the whole challenge, and they win.

Episode 3 - "The Good, The Bad, and The ********"

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Episode 4 - "The Butterfly Effect"

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  • Penny is one of the two coin contestants in OSO. The other one being Coin.
  • She is the only OSO contestant with a brother.
  • Given her reaction to being put inside Sippy Cup, she may have claustrophobia.
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