@Robbini I have nothing against the sword. I was actually surprised with the subversion of using the sword as summon material rather than use it for himself. A lot of Isekai go for "the spectacular katana" for the MC.
But come on, an historical figure? Is just barely more original than the use of katanas...
You have the chance to build an original character. Even better, an historical ambiented character. Use the same motivation, it could even be based in the story of Hijakata Toshizou, and the writing would feel fresh. But no, is a ripped from time and death historical figure, putted in a fantasy setting, in a supposedly serious sittuation.
Is soo....cringe.
And even worse, is still cliche. Not to Isekai per se, but to fantasy and sci fi. Some did it good, and some bad. But is still a sign of a bad fanfic (but yeah, i guess is stupid to expect something better than a fanfic from Isekai)
Is like Dante writing the Divine Comedy and putting all the Greek heroes of the clasics in hell and all the roman figures of history in heaven. Or that manga where a fantasy prince is given the RPG job of Oda fkng Nobunaga...
But yeah, nothing against the use of the katanas here. I just espected more of the choosing of character. But....if it is a theme (Fate style? xD), i guess it would be more interesting. It would look more like something planed and less like a wish fullfilment for the author.
PD: And we have enough Hijakatas in manga already.... Gintama, Golden Kamuy, etc...is like Oda Nobunaga, is fkcng everywhere.