When Mannick suggested splitting up earlier, Ingrid agreed because they did not know the entity's objective in coming to the island. She also did not want to get attacked by the entity and the legendary beasts on both sides.
Dealing with the Manticore while covertly checking the location where the entity was last seen, which was at the Echidna's location, was better.
Unfortunately, Mannick and Imman met the entity before getting to the Manticore. They were forced to change their target and fight the entity. As luck would have it, the Manticore joined the fray forcing Imman to run with Mannick's status unknown.
But now that Mannick had returned and apparently found the reason for the entity's appearance on the island, they could now plan a better strategy.
"So the entity is after the legendary beasts," Imman commented.
