Interesting implication of "monster" as opposed to "evil" is that we embrace lovable monsters (see Sesame Street)- it's a word with some positive connotations, or at least not entirely negative.
Cookie Monster is a Beta?
That would explain a few things.
If we follow this line of inquiry to its logical conclusion, then the Anomaly may turn out be a purple T-Rex.....
Aiiieee! (fails SAN roll, some things man was not meant to know)
NOW you've done it! You said that where the PTB can hear!
They like a challenge, you know...
(My fandom lives in fear. Delightful, anticipatory fear.)