I read a sentence 'Some personality quirks aside,' in the following context
When I was a kid, our neighbors had two twin cats. They looked seem- ingly identical—the same charcoal fur and the same piercing green eyes.
Some personality **quirks aside**, you couldn’t tell them apart just from looking at them.But of course, they were two different cats, two separate beings, even though they looked exactly the same.
Psersonality is a noun,so 'quirk' should be a verb.
In Oxford Dictionaries, it reads
A peculiar aspect of a person's character or behaviour.
(with reference to a person's mouth or eyebrow) move or twist suddenly, especially to express surprise or amusement.
From the definition, a verb doesn't make sense. If a noun, I'm unable to parse its grammar and catch its meaning.