Hello wikipedia articles that are seriously going to be a help when I inevitably wind up subbing ALL of Hard to Hold:
R Leporis/Hind's Crimson Star (that gets expounded upon in like 3 different scenes in the play)
John Russel Hind (dude who found that star and also had some WICKED eyebrows it seems) (also also LOLOLOL a guy named HIND married a chick named FANNY. What? I am 10 obviously)
ETA: Randomly, I love how Jin calls Yuuta "ユタちゃん" XD it's so simple and cute~