Yanagimoto is said to be a brilliant fellow, but also an oddball too. According to one anecdote, while walking from Yokosuka back to his home in Tokyo, he suddenly took out a book and committed its contents to memory (the reason was not mentioned).
That said, he's usually a decent, serious, hardworking man (so as long his switch is not flipped). During Midway, to bolster morale, he refused to subject his men to the iron-fist treatment the Japanese military was so fond of. And when Souryuu sank, after seeing the last survivors off to safety, he leapt into her burning bridge and perished with her.
Defeated Enemy Abyssal Ships (R15G)
R15G is a pixiv tag warning of goreHey, are you listening?*eek eek**Slam*SouryuuHm?A dangerous fellowJust what are you looking at...?Holy crap, this one's the most dangerous!*Clack**eek eek*Soryuu's final Captain Yanagimoto Ryusaku was rumored of having the habit of smirking alone while looking at the photos of sunken enemy shipsSouryuu-senpai, about your turn of teaching at the archery range-