After successfully forming a pact with the Sentinel of Lust, Cyanide discovered that he could form an Oathsworn bond with them as well just like he had with Kirika, despite the Sentinels supposing to be 'outside' the game's control.
He had already suspected it before due to various clues, but this only confirmed it further. Apart from the Gamemaster, the being who turned this world into a 'simulation', there was another entity who was working in the shadows, against the GM. Certain implementations in this game world and the system of the game itself directly contradict with the Gamemaster's ideals and motives. The fact that Cyanide could form an Oathsworn bond with a Sentinel—or rather, the fact that the Sentinels were included in the Companions tab in the first place—was one of those contradictions.
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