I really find Shiraishi's reaction odd whenever he listens to Kaizoku's goal. Perhaps he thinks he can't become someone with a great goal such as becoming a ruler, which is the exact opposite of Shiraishi just wanting to live an easy life. It's like he is uncomfortable at how big Kaizoku's ambition is and the determination to make it come true, or maybe something more than uncomfortable being with someone completely opposite to him.
Everybody with thier Ideology 1. Lt tsurumi with his Comrades revenge ( i forgot the railway war name started with M ) 2. Hijikata with his Hokaido independence + every racial unite 3. Boutarou 😂😂😂 well he wanna be a king if he boight a land and sell fruits over the world + put his face on the money 4. Sofia with her partisan
Funnily enough they arent mutually exclusive like sofia want the money to free the russian empire which would definetly go hand in hand with Lt. Tsurumis idea to get revenge for his comrades in manchuria Hijikata idea of independance is also fairly compatible with