Glück owning his interrogation
Spoilers for Frieren manga chapter 130
As soon as Glück realises someone wanted something from him, he immediately seeks to find out who. He starts by bombarding Kanone with questions, but he doesnt expect her to answer them. On the contrary, he gives her no chance to reply by voicing his deduction out loud and answering the questions himself.
Note that thinking out loud isnt his habit. In Macht's memory and when he talked to Frieren, whenever he needed to analyze or think about what to say next, he would stay silent.
Glück is careful with what he says and makes sure they serve a purpose. He intentionally let Kanone hear what he thinks. In this case, it's to show Kanone how capable he is, that he isnt easily swayed. He wants to stress her tf out and then acts like he cant actually do anything.
With this, Kanone would think mere talking doesnt get him to say what she wants, but since he shows signs of giving in, she could use other methods. He tries to direct Kanone's action with his words. And it worked. Kanone makes her first blunder when she switches approach and offers him a cigarette. How does she know he likes smoking if this is the first time they meet? It should be told to her by someone. Glück probably tells it's Fräse on the first puff, but he doesn't ask about Fräse immediately.
He continues with a seemingly harmless comment, but this, my friend, is a trap to get Kanone to spill out her relationship with Fräse first.
Her guard is lowered when he acts like giving in, so now she honestly replies. This is the second blunder, and that's enough info for him. He goes on to ask who's the captain next and Kanone's silence confirms his guess.
After exposing Fräse's involvement in his interrogation, stating he's familiar with her scheme (and also that he should have let Macht kill her lol), Glück doesnt stop. He even tries to get Kanone to switch sides by posing as someone she could benefit from, similar to how he persuaded Macht back then.
This is from a chapter whose purpose is to give the audience a brief look at the Empire's political state, to power scale Fräse and to explain why Denken would be missing from a big event between the Empire and the CMA. Glück's appearance is to deliver these info, but his lines are so well-crafted and you can get so much of his personality out of them that you don't feel like he's just a mouthpiece for the author to yap.
