玉、魂、宝(石)
kanji research
you can use 霊 (as in 呪霊 (JUREI; curse spirit) or 怨霊 (ONRYOU; vengeful ghost)) for 魂 (TAMASHII, where 霊 is also read TAMASHII) meaning soul
霊 can also be read as TAMA which will also use bc 玉 (TAMA) can be used to refer to jewels or pearls
it also forms a primary radical in 宝石 (HOUSEKI; gemstone) so it would be possible to do a kanji wordplay referring to a 霊真珠 (REISHINJU) as a 玉石 ("HOU"SEKI) and it can have an alternate reading as "TAMASEKI" and that can be written as 魂石 (soul stone) or 霊石 (spirit stone)
all as different ways to refer to 霊真珠 the spirit pearl as a soul jewel
the HOU in HOUSEKI is 宝 (TAKARA; treasure) (宝石) for treasured / precious rock, but the primary radical is still 玉 for jewel (more archaic) (or modern day used for sphere or ball)
IV: I think having many ways to refer to one thing makes the world feel more real where the minor variations all can be used in different contexts that tell you different things about the speaker and it also hardwires the bilingual text into the story where the story MUST be presented Exactly like this
the japanese is INTRINSIC, not ornamental
and it can't exist in any way Other than written, bc the compounds have kanji differences (ie it couldn't be converted into an animation and it couldn't be written purely in the English alphabet)
any English speaker that disregards the translation differences or ignores the kanji altogether to try and pretend there is no Japanese involved is intentionally creating their own mistranslation of events