There are numerous anime characters who use katanas as their primary weapon. Here are some notable examples:

1. Roronoa Zoro - "One Piece"
2. Kenshin Himura - "Rurouni Kenshin"
3. Mugen - "Samurai Champloo"
4. Guts - "Berserk"
5. Ichigo Kurosaki - "Bleach"
6. Inuyasha - "Inuyasha"
7. Saber (Artoria Pendragon) - "Fate/stay night"
8. Afro Samurai - "Afro Samurai"
9. Mifune - "Soul Eater"
10. Himura Shinomiya - "Food Wars!: Shokugeki no Soma"

These characters represent just a few examples of the many anime characters who wield katanas as part of their combat repertoire. Each character has their own unique style, abilities, and storyline that showcase the katana's prominence as a weapon in anime and manga.