First of all, Arnark hated the fact that there was another System in his genre. Secondly, he didn't like how he was barred from attaining Grade 2 for the time being.
It was a setback, especially since he had to face Compass Carburettor soon enough.
Upon arriving at the Fantasy World, Arnark observed the streams of fate in motion, observing some of them influencing his body, causing him to scowl in response, "Dammit!"
'My inherent nature is causing my fragments to hum in response and wish to join with Compass. The greater his growth as the Main Character, the stronger this pull.' This was the reason he wished to kill Compass Carburettor.