Why would prim be better than Katniss in the arena?

Prim isn't better than Katniss, nor is Katniss better than Prim. However, Prim has more likable character traits, which makes her seem like a better character.

• Prim is friendly
• Prim is kinder, and makes friends easier than Katniss does
• Prim trusts people more so than Katniss