If Ahri - Inquisitive is killed by Hidden Blade before her 'When defending' trigger resolves, does the trigger still resolve?

Ruling: Yes, the trigger still resolves, but it does nothing because it tries to find Ahri "here" and is unable to find her since she has been killed.

Nuances:

• The trigger goes on the stack and will resolve even if the source unit dies
• The effect fails to do anything because it cannot locate the unit that is no longer in play