This game has the best replayability (Spoilers)

*Maelle's nightmares

pAlicia: "those who know not that they are not"

pRenoirs: "this is a kindness not a cruelty"

Lune arguing that Lumiere matters more than individuals

Why The Curator is helping expedition 33

Every time Verso makes an appearance before meeting him

Every time Verso LIES

EVERY conversation between pRenoir and Verso

The Axons... Verso: "that was Verso wasn't it? Renoir"

Fire being Maelle's signature

pRenoir: "This is all you have left of your son."

The repeated emphasis on art (Canvas, Paint, Color, Creation, ...)

The Soundtrack's lyrics

Monoco's love to "fight"

The environments look painted
.
.
.

All realised/understood after 1st playthrough