His name was Bruno Gaido.
He was later shot down during the battle; he and his pilot were picked up by a Japanese destroyer. They were interrogated for a week, then weighted down and shoved overboard.
If I remember the full story, the Kempeitai officer aboard the ship had to do the dirty work himself. The rest of the crew refused to participate.
Yup, couldn’t remember his name. Anyway, yeah, the film is not taking artistic license or engaging in revisionism when they show that - as unbelievable as it was, that’s actually what happened.
I do suspect he had to go back to his quarters for a change of underwear and possibly new trousers afterwards, though.