Would Umordoth still move from its' turn's starting location if an investigator is already there if it can instead ignore that investigator and deal damage to two investigators?

For some context

First time playing this scenario with 2 other people, still on Easy (Mainly because we got our asses handed to us from switching to Normal on Midnight Masks after being cocky from how easy the Gathering was).

We actually did pretty badly still and wasn't able to advance the 1st Act (Not for lack of trying, I didn't even tell my group that it's actually harder to advance the Agenda because it causes the the uncaptured Cultists to spawn... which... was all but 1 of them lol, which heavily contributed to why we couldn't advance the Agenda because we had no time at all).

After seeing Umordoth, we decided to just kite him to the Arkham Woods location where an Investigator can recover 1 Stamina/Sanity a turn, then 1 of us had a brilliant selfless idea if immediately going towards Umordoth so that the remaining 2 won't have to immediately take damage from Umordoth that turn, it did mean he'll likely die the turn afterwards if we can't kill Umordoth the following turn (*Spoilers* It took 1 additional turn afterwards)

Honestly this took all sorts of luck and stars aligning (Our Cluever having the Fight Event that adds additional damage per Clue up to a max of 3 did so much work taking out a chunk of Umordoth's health), as initially we almost thought we failed the penultimate hit to Umordoth, until we noted that Umordoth, for some reason... is only an Ancient Evil and not a Monster which meant that there were no added negative modifiers to the Skull Token)