Tatsu Yamashiro

Tatsu Yamashiro is one of the former handlers of Oliver Queen. Tatsu is also the wife of Maseo Yamashiro, and the mother of Akio Yamashiro.

Biography
She and her family left Japan because they were on the bad side of dangerous people.

Housing Oliver Queen
When Oliver awoke in her house she welcomed Oliver to her home.

Some days later, Oliver asked where Tatsu was where Oliver stated that she disliked him. Maseo corrected Oliver that Tatsu hated Oliver.

A while later, Tatsu told Maseo that she just wanted to go home but was told they can once they deal with Chien Na Wei. After Oliver was interacting with her son, Tatsu demanded Oliver to stay away from him. She proceeded to give him a meditation that helped Oliver remember where he saw the man hide the envelope. After Oliver thanked her for helping him remember, Tatsu demanded that Oliver leave their home as soon as possible.

After Oliver left his dirty clothes, Tatsu reminded Oliver that she isn't his mother or wife and told him to do his own laundry. Hours later, Tatsu worried something had gone wrong as Maseo said he should only take an hour. Tatsu calls a friend to watch over Akio while she left with Oliver to search for Maseo. When they arrive at the docks, they meet the triad. After Oliver attempted to greet them, Tatsu rescued Oliver, using her Katana. Tatsu asked one of the men what happened, where she was told that they killed three A.R.G.U.S. agents. When Tatsu arrived home, she was shocked seeing her husband alive.

Oliver and her husband began capturing triad members and torture them for information. After they kidnapped a man that stole the OMEGA virus. Chien Na Wei tracked down the house of Maseo. Chien broke into her home and confronted Tatsu and her son. Tatsu told Akiko to run however Chien blocked the way and picked up one of the swords. Tatsu threw a chair and grabbed a sword after which she fought Chien in a swordfight. Tatsu got injured and lost (off screen) against Chien who took her away.

Personality
It was stated that Tatsu hates Oliver. She did not hide this either when she openly told Oliver he can thank her for helping him with his tasks by disassociating himself with her family once his job was done, apparently unaware that Oliver was only helping Amanda Waller to safeguard her and her family. She later seems to warm up a bit for Oliver as he confronted Triad members in an attempt to find Maseo.

She deeply cares for her son and husband and this might be the reason for her hostile stance towards outsiders.

Abilities

 * Expert swordswoman: Tatsu is revealed to be skilled in using a katana. She cut down multiple Triad members in mere seconds. She was able to hold her own for a while against Chien Na Wei before getting overpowered (offscreen).
 * Expert hand-to-hand combatant: Tatsu is skilled in close combat.
 * Meditation: Tatsu is skilled in meditation and was able to guide Oliver into using it to analyse memories.

Equipment

 * Sword: Tatsu can proficiently wield a sword.

Trivia

 * The role was originally to be played by Devon Aoki but due to other commitments, Rila Fukushima was cast for the role.
 * In the DC comics, Tatsu Yamashiro is known as the superhero, Katana.