Pepper (じゃじゃハムちゃん) is a recurring character and Oxnard's love interest-later-wife. She is a rural, strong, and independent hamster who has helped the Ham-Hams with various challenges.
Pepper is Kana's cousin, Dylan's, hamster. She lives on a farm, so she naturally likes farm-related things like animals and plants. When she visited the Ham-Hams in the city, she called them "city slickers" and thought they were crazy for not doing things that she did there (such as running onto the road, and riding a donkey inside a building). Despite her boisterous nature, she cares about and is close friends with the Ham-Hams - Oxnard especially. She's also athletic, talented with sports like snowboarding. She is extremely skilled at controlling animals of all kinds. She is smart, but has a quick temper.
Oxnard and Pepper are official lovers. Oxnard first admitted his feelings - thanks to Hamtaro's encouragement - in Oxnard's Big Crush, when he yells "I really like you!" to Pepper from afar. In many of their encounters, however, Oxnard and Pepper are prone to arguing with each other; but generally, things are settled quickly. Despite their occasional outbursts, Oxnard loves her deeply, and she returns his feelings.
Late into the series, Oxnard refuses to return home with Kana, and stays at Dylan's farm with Pepper. In Happy Ham-Ham Wedding!, the finale of the Hamtaro series, Oxnard and Pepper return to the Ham-Hams to announce they are getting married, and invite every Ham-Ham they have ever met to the wedding.
- Oxnard's Big Crush (#37)
- Welcome Pepper! (#42)
- Pepper's Visit! (#53)
- The Baby Goat (#70)
- Let's Dance, Ham-Hams! (#110)
- Oxnard Shows True Love (#119)
- Pepper, Empress of Spring! (#138)
- Run, Pepper! (#179)
- Nice To See You, Pepper! (#242)
- Holiday with Broski! (#266)
- Oxnard and Pepper (#285)
- Happy Ham-Ham Wedding! (#296)
- Main article: Pepper/Gallery