{One and Three}

Three was friendly and caring. She was always doing something good for those around her. Three also had a habit of observing what was going on around her. She also loved science and claimed that meteoritics was one of her "fifty favorite scientific fields."

Her friendliness was especially evident in her relationship with One; Tri was the first to befriend One and share the power of the Yoilit. In her relationship with One, Tri displayed her energetic nature when One told her about the meteorite.

However, she is also impulsive and has a poor word-keeping ability. Despite One's desire to keep the Yoilite a secret, Three decided to share it with the rest of the Algebralans, believing it would help everyone. Despite her good intentions, this resulted in One feeling betrayed and angry, demonstrating that Three can unintentionally provoke conflicts due to her impulsiveness. After One learned that Three had revealed Yoilite to others, One became enraged and destroyed her, but under the influence of others and One's sense of kindness, Three almost immediately stopped, wanting to make things right. However, after One's revival, Three could no longer properly control her powers, releasing her power unintentionally with every emotional outburst, which could harm the other Algebralans. After this, Three no longer regarded One as a friend, recognizing her as a danger to others and herself. Three, you could say, broke after One destroyed her and then restored her. After that, Three began acting cold and distant toward One and the other Algebralians, trying to avoid confrontation. Three's voice is also now lagging... meaning she stutters a lot and her voice trembles.

Three - the number 3 in red with a patch on the left eye, Algebralian.

One appears aloof, angry, and seemingly useless, because she is. She constantly observes others to identify their weaknesses and uses this to blackmail them into signing her proposals, often for a reward she may not provide.
One is easily irritated and loses her temper when people hesitate, resist, or challenge her. One is sometimes incredibly cruel and manipulative. She shows no remorse for destroying and eliminating people for whom she is responsible. She is also extremely power-hungry, scheming, and so on. Overall, One is depicted as vindictive, manipulative, and short-tempered (if anyone tries or even thinks about ruining her plans, she will instantly fly into a rage).
In the past, before her imprisonment, One was a sweet but lonely digit who longed to befriend other Algebralians. She eventually befriended Three. However, she also acts impulsively and doesn't realize what she's doing until it's too late. She killed Three for betraying her, then desperately tries to make things right by restoring her body with her powers. She struggles to right the wrongs she's done, fearing rejection and being left alone. After her imprisonment in the Moon, her desire for revenge against others intensified, though she remains remorseful for her actions.
Even today, Wan still suffers from loneliness. This means that, despite her hostile behavior, she still lacks self-confidence.
After One was freed from her captivity, she decided to somehow restore Three, even if she did not have enough strength to do so.
One is the number 1 in blue, Algebralian.