In "The Walking Dead" TV series, Michonne is primarily known for wielding a single katana as her weapon of choice. The katana, named "Katana" by the character, is her signature weapon and a crucial part of her identity on the show.

Throughout her appearances in the series, Michonne is consistently shown using and carrying only one katana. She is highly skilled and proficient in its use, relying on her expertise with a single weapon rather than multiple blades.

Therefore, based on the depiction in the TV series, Michonne is typically shown with and primarily uses a single katana.