While dithering on whether to build a kitsune or anadi monk, I had a flash of madness. Both let you change into a humanoid. So, a kitsune could change into an anadi if they somehow justified growing up in a hidden spider village. But … what abilities, if any, come with it? It’s not as clear as Pest Form. (Hopefully the remaster is clearer too … )
Anadis true Form is the spider, Not the humanoid
They also don't have inherent shape changing but learn it
They certainly wouldn't mind a kitsune in their Village, but that kitsune would most likely get a human Form that is based on her own looks, bo Real interaction with the anadis there
You transform into a specific alternate form determined by your heritage. If your heritage doesn't list a form, your alternate form is a tailless form, which is a common Medium humanoid ancestry prevalent where you grew up (typically human). This form is the same age and body type as your true form and has roughly analogous physical traits, such as hair color. Using Change Shape counts as creating a disguise for the Impersonate use of Deception. You lose any unarmed Strikes you gained from a kitsune heritage or ancestry feat in this form. You can remain in your alternate form indefinitely, and you can shift back to your true kitsune form by using this action again.>common
While I was inspired by cheesery of having a kitsune taking an anadi form, or an anadi taking a kitsune form, my real question is what they would get from whatever humanoid they chose. Since it doesn't limit you to just humans, things like darkvision came to mind, as well as if you grew up where a common ancestry happened to have natural attacks or alternate movement speeds of their own (ones that don't rely on ancestry feats or heritages).
Nothing at all, the Form is just cosmetic for both of them / that is something you about which you have to Talk to your gm
The "common" part of the sentence refers to its game-mechanic rarity: common, uncommon, or rare.
This is a fairly meaningless distinction because of Rarity: Different Contexts [Gamemastery Guide pg. 35] "Just because something is common or uncommon in one context doesn’t necessarily mean it’s the same in others" and Rarity: Starting Elements [Gamemastery Guide pg. 35] "For instance, a game set in the lizardfolk empire of Droon might have lizardfolk (normally uncommon) as a common ancestry while the typical common ancestries are less common."
So when it says "a common Medium humanoid ancestry prevalent where you grew up (typically human)", it's clearly NOT limited to the default book listing but based on what's Common for the setting and context of it: it's a matter of perspective and not a hard restriction/requirement. An Anadi growing up near Kihime in Tian Xia or Angen in the Inner Sea region very well could have the option pick Kitsune since the book rarities are by definition mutable and shifting.