1

Easier to sneak up on you that way.

2

It has for so long it’s forgotten why.

3

Its true form is incomprehensible to humans, leading to madness in cases of long term exposure.

4

It's shy

5

Its true form is almost completely immobile. Its false form is merely a lure.

6

True form sounds like Dick Van Dyke in the beginning of Mary Poppins (maybe that's too silly)

7

Species is a sentient light that is fatal to humanity when it bounces off their retinas; they refract themselves into crystalline peacebodies for safety when dealing with us

8

Its already in its true form, a rumor just got way out of hand.

9

Taking a new form is a memory anesthetic, all too temporary

10

Once they transform they cannot go back. They fear the final metamorphosis.