同棺友人 Literally translates to Friend sharing coffin this might be referencing

Relation Nicknames

故人重逢于枯骨 [gù rén zhòng féng yú kū gú]
Literally translates to Reunion with old friend on dead bones Its a dramatic and somewhat dark portrayal ...
同棺人 [tóng guān rén]
Sharing the Same Coffin evokes images of mortality and shared destiny hinting at a deep connection ...
伴葬 [bàn zàng]
This name suggests accompanying in death or sharing someone ’ s final journey carrying a somber ...
棺木人 [guān mù rén]
Translated literally as Coffin person this unusual and somewhat morbid name might reflect a fascination ...
骨灰盒 [gú huī hé]
Urnmate translates more literally to ashes box Using this term which traditionally holds the remains ...
知己生死与共 [zhī jĭ shēng sĭ yŭ gòng]
Loyal Friend Sharing Life and Death : Symbolizes an intimate friend with whom one is willing to share ...
葬友 [zàng yŏu]
Simply means a graveyard friend possibly implying a dark or morbid humor referring to companionship ...
柩伴到老 [jiù bàn dào lăo]
Meaning Coffin Companion Till Old Age its a somber yet poetic reference to sharing life and even death ...
葬他身旁伴她身亡 [zàng tā shēn páng bàn tā shēn wáng]
This expresses a desire to be buried next to a loved one upon death The phrase implies eternal devotion ...