Koishi Komeiji acts before thinking things through. In fact, by the time she’s thought one thing through, she’s already finished the following act. “I wonder how Satori is doing.
With this much stuff, surely I can win.”

With her ability, Koishi can manipulate people’s unconscious minds, allowing her to move around freely without being identified.
However, it seems she uses her ability subconsciously, and, as such, has never used it on someone intentionally.

Princess Joon the Chivalrous
Phantom Thief!
The night was still, and the village was asleep. Moonlight trickled down and caressed the darkness. But then, from the outskirts of the village in Myouren Temple, a trainee’s voice broke through the silence. “We’ve been robbed!” they squealed.
Torchlight dashed through the temple in pursuit of the thief, and all erupted into chaos.

When did they appear? Unknown.
How did they get in? Unknown. What are the witnesses saying? There were none. There were no witness testimonies, no evidence, not even a clue. Even if it was the middle of the night, it’s remarkable how they were able to sneak in without anyone on patrol noticing them. They then completely disregarded the treasure hall, opting for the riskier route of stealing any valuables the sleeping temple residents had on their person.
Who could the thief be…?

In all likelihood, the thief didn’t care what the time was. They probably strolled through the front gate, rocked up to where the temple residents were sleeping, and stole whatever they wanted. That seemingly impossible chain of events was the theory put forward by the collective reasoning skills of Myouren Temple. There could only be one culprit Koishi, the Invisible Phantom Thief, a member of the infamous Sisterly Thieving Unit - Kotori Festival.