Arrow: Ranking Every Character From Worst To Best

One of Arrow's best limited uses of an iconic comic book character, Tatsu Yamashiro had a relatively major role in the show's third season. Reluctantly aiding Oliver as her husband Maseo worked alongside him in the flashback narrative, she grew rather fond of him and ended up becoming one of his closest allies throughout his battle with Ra's Al Ghul in the present.

A masked sword-wielding assassin by the name of Katana, her character journey met a tragic end when she had to use her sword to kill her League of Assassins-trained husband.

Of course she could have been used more here and there, but then again, had the writers taken a few missteps with her at some point down the line, she may not have remained the badass that we remember her as.