I'm pretty sure he doesn't have the Sharingan despite his use of fire ninjutsu, genjutsu, and red eyes (Kurenai also has red eyes) But that being said I have reason to believe that he may actually be related to Mui, from the Naruto & the Blood Prison movie, in some way. As Mui is the only seen user of Fire Style: Celestial Prison, a similarly unique move that Scarlet Blaze ALSO has access to. And it's been stated that the technique was developed by Mui's clan. So it's possible that Scarlet, for some reason or another, lives & works in Konoha as opposed to Kusagakure. Maybe the opportunities for being a ninja are just better? Anyway, those are just my thoughts on the matter.

I've also tried looking into the "Red Lotus" that Scarlet's 3rd mystery and 1st passive mention to no avail. So it appears that the most peculiar thing about Scarlet, that may point to his origins, is his usage of fire element sealing techniques. I'd like to think that the translators screwed up by mislabeling his being in a clan as him having a kekkei genkai since the game has quite a few translation errors... But this also makes me wonder why his passive, "Secret of the Red Lotus", empowers all ninja with a kekkei genkai, himself included...
That being said I'm going to test the Red Lotus passive tomorrow to see if it works on non-bloodline clan ninja like Shikamaru. Once I finish my tests I'll post the results here.

This post was last edited by Phantasos at 2016-9-13 01:45

http://image.prntscr.com/image/1f6118cf8fc04956bf808ad548057c41.png
Welp... I took a screenshot of Scarlet activating his Red Lotus Secret passive with the iconic Ino-Shika-Cho team, and he was the ONLY one on the team to get the buff. So the buff ONLY works on those with the "Blood Limit" mark, and it doesn't work on those with the "Secret Technique" marks...

So I dunno where that leaves us. So many questions. @-@

I'm pretty sure he could be using genjutsu to empower other's kekkei genkai, as it's stated in his profile that he uses genjutsu both to debilitate enemies & empower allies. But for all we know the Red Lotus Secret could be a Kekkei Genkai. XD

Today I was messing around with a Fire team and found this.

http://image.prntscr.com/image/a1bbc3f8a3874814aa4d7cfbf77bb2c8.png

Her mystery also mentions the "Red Lotus" Do you guys think it's any coincidence or does the dev team just like the sound of fire attribute stuff having something to do with Red Lotuses? xD