Sensing the previous Archduke Dipo, Angus immediately controls his [Great Mana Echolocation] to avoid him while ordering Cupid to go around the area. This will lower their risk of being found.
Angus didn't want to have any kind of confrontation with the previous archduke, especially after the previous incident over the last few days. He also didn't want to get involved with this Guardian matter anymore.
Through King Leon's short message, Angus knows the Guardian and King Leon is on the verge of war. Hence, it would be better if he wasn't involved in this muddy water.
Unlike their leader Patimura Dipo, the Guardian members stay a few hundred meters away. This distance is to avoid any stray attack from the Guardian leader and give him more space to fight. It also acted as a buffer zone when the Gram passed through leader Patimura.