acting. Aramogord the “Demon God Defender of the Kingdom” is a blood-thirsty ruthless monster without any mercy who would give the worst beyond imagination to anyone who dare to oppose him. When he try to dig out the enemy soldier from the weapon, even the city's knight is sick from seeing the gore (his mecha also use bare hand to tear out the flesh because he's not good with detailed works and need to hurry before the bomb explodes).
That’s why he choose brash over-the-top speech during performance (family tradition). It helps intimidate most enemies, strengthen Aramogord’s public image, and helps him cover up his social awkwardness.
His real personality is the hikikomori boy. When facing unexpected situation he would sometimes mistake his vocabulary selection.