oh! hehe kinda pleased you picked up on that, because
a) I really like lilac too
b) when Reigen gets his ‘own’ aura in ep12 it largely seems to be of the lilac-magenta spectrum, albeit with some rainbow variance
c) I was looking up stuff about auras for a different character a while back (hey remember Justin Case u guys) and indigo/purple has connotations of not only intuitive wisdom and clear mindedness, but also of spirituality- it can be seen as the 6th layer of an aura which is supposedly the ‘angelic’ body of an aura- which I think fits Reigen pretty well!
d) not even related to the character so much as mp100 on the whole but the association I grew up with was that lilac is worn as a symbol of recent death and has ghostly connotations, so symbolically speaking I feel it always has an edge of melancholy and the supernatural to it, I don’t know if that’s just a UK/Europe/me thing or what though…
e) I just really like the colour ok it’s pretty