Aisha's devotion to her Order is unquestioned; just as her mother died to protect, she too will lay her life down on the line to defend her beliefs. Thomas thankfully isn't a monster and can be handled like any normal, non-Rashidi based problem - through peaceful mediation, and bloody combat if that fails. Don't let her girlish looks fool you - Aisha is far stronger than Thomas and boasts solid physical evasion and good accuracy off her physical strikes. Taking down this young man shouldn't be much harder to manage than dispatching Orcha was, who was burned to ashes by the strength and purity of her Ankh attacks!