I.... doubt it. The gap between their personality is just too wide.
I hope so too but I have already waited for a long time. I'm sure shishou is the first sword because we've seen him with his sword form. Now we just need the reapparence of kikyou and shiou (=・ω・=)
it's been decades. even mikoto changed and he's younger. that mysterious sensei is definitely the first sword. i can read a bit of japanese so check the bottom of this panel. http://www.mangago.me/read-manga/goshintou/tr/125753/page/157/
he is holding his sword marked as ichi or "number one".
i thought so too that it was kazuto. But what made him change his name and become someone like that? Was kikyou killed by some human? I thought his master will become immortal as well (๑•ㅂ•)و✧
kikyou is only human. ofc he will die. if you notice, the ownership of the swords are passed on every generation.
as for change his name and stuff, ask duo brand lol. we never get to see a sequel. and this honestly needed one.
kikyou and first sword! DAMN! I WANT MORE LIKE? i wish they make an apperiance in the modern era! like the mysterious powerful guy may be the first sword! (づ￣ ³￣)づ