Malachi realised it a touch too late.
There was no turning back once he embraced the Demon Cult and became an Apostle. He was humanity's common enemy and a monster that had to be hunted. This was something he was well aware of when he held the Prophet's hand, turning himself into a demonic human. But deep down… Malachi wished to keep some semblance of his noble past. To retain his honour as a Knight.
But that notion was viciously stepped on by Amon's cutting words.
"Thank you for reminding me… I'm a Demon, not a human."
"..."
Amon gazed at Malachi with an icy, unflinching stare—devoid of sympathy, absent of hesitation. Whatever revelation flickered behind the Apostle's eyes, whether a moment of clarity, regret, or twisted enlightenment, meant nothing to him.