Upa has long dark hair and a bandanna that covers her right eye. She wears a long sleeved, white shirt, a yellow jacket, and tan pants. Like all members of Tonari's group, she has a black cloth wrapped around her right wrist.
Her weapon of choice is poisoned blow darts.
Upa is a very quiet, kind, and generous girl, going through the trouble of getting cow's blood to congratulate Fushi on winning his match. However, she can be rough when the situation calls for it, as seen when she threatened to use poisonous darts on the next person that tried to yell at Tonari.
Little is known about Upa's past, however Tonari revealed that she was sold off by her parents for a silver coin.
- Her dream was to find out where the sun comes from. Her dream came true in Chapter 41, after defeating the Knocker.