Synonyms that are in the dictionary are marked in green. Synonyms that are not in the dictionary are marked in red.
Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
By using the phrase "Would you kindly," he is able to control Jack and use him to eventually kill his arch nemesis, Andrew Ryan.
It's quite similar to how villain Frank Fontaine used "Would you kindly?" to manipulate the actions of Jack throughout the game.
Source: https://gamerant.com/honkai-star-rail-kafka-missing-ability-spirit-whisper/