Dark Marquis Fulwood belonged to the Spirit Tree Race and on top of that he was second son of Dark Duke Tomas! That's why he always held more authority than Jethro and had always kept him in check.
But Jethro sudden betrayal and his identity as a Star Hacker Spy directly finished the competition between the two men which had been going on for decades. If anything, Fulwood was thrilled when he found out about this and even wanted to reward Jacob for this favor.
Now, he can lawfully annex all Jethro's assets and extort those loyal to him or had dealings with him. Although the top-level figures of the Dark City didn't talk about it, Fulwood was very ambitious and greedy for power. So, everyone stayed out of his way and avoided any conflict.
At this moment, Fulwood in an ocean green attire was calmly hearing Heath's report on the incident while sitting on his high chair.