I might be overanalyzing this or being a little biased
but I think that the mc is a reference to the Night Song from Nietzsche or coincidentally fits very well into it
Since in chapter 1 its mentioned that he is the Light that illuminates the never ending darkness of other people
and through the sleep trades he can GIVE his light
The song goes as follows:
The Night-Song, the immortal plaint of one who, thanks to his superabundance of light and power, thanks to the sun within him, is condemned never to love.
Light am I; ah, that I were night! But this is my loneliness that I am girt with light. Ah, that I were dark and nocturnal! How I would suck at the breasts of light! And even you would I bless, you little sparkling stars and glowworms up there, and be overjoyed with your gifts of light.
But I live in my own light; I drink back into myself the flames that break out of me. I do not know the happiness of those who receive; and I have often dreamed that even stealing must be more blessed than receiving. This is my poverty, that my hand never rests from giving; this is my envy, that I see waiting eyes and the lit-up nights of longing. Oh, wretchedness of all givers! Oh, darkening of my sun! Oh, craving to crave! Oh, ravenous hunger in satiation!
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Theres more to the actual quote but as of now I think those fit parts fit the mc the best
While the mc is able to save other people with his light
he himself cannot be saved
and he might start desiring he never had this light in the first place
Tho again as I said im probably just overanalyzing this
theres a lot that does not make sense aswell...