Hon färgar det

Canons roman Leia, Princess of Alderaan visar tonåring Holdos frekventa döende och excentriska garderobsval:

Amilyn Holdo wafted along, the same slightly glazed expression on her face. Her hair had been dyed pale blue with orange tips.

'Apparently Holdo goes her own way'....which was a good reminder that it shouldn't matter to Leia what this girl wore or what colors she dyed parts of herself, or that she always spoke in the same airy monotone.

- Chapter 6

Holdo's hair had been dyed the same green as her cloak, though at least only the cloak had little bells sewn all over it.

-Chapter 8

Holdo, whose hair had been dyed glittery blue...

- Chapter 32

Den wikia du citerar i din fråga har följande citat.

Holdo became disinterested with the peaceful culture of her homeworld, so she expressed herself by dyeing her hair vibrant colors, wearing vibrantly-colored clothing, and going on daring escapades.
Amilyn Holdo

Det står också att hon är en mänsklig kvinna från Gatalenta så det verkar som om hon är full människa.

Filmens visuella ordbok ger information om hennes hårfärgningsrutin samt bekräftar orsaken varför hon färgar hennes rosa hår.

Kort sagt, ja, hon är mänsklig. Hon färgar håret med något som heter kromomiter och hennes frekventa hårfärgförändringar speglar hennes arv, som kommer från en bohemisk planet som är känd för sina poeter och artister.

A STRIKING APPEARANCE

Holdo doesn't wear the combat khakis and camouflage kit most often spotted in Resistance bases. Instead, her dyed hair and eye-catching clothing show her fierce devotion to her homeworld of Gatalenta and its independent spirit. Gatalenta is known across the galaxy for its poetry and the tranquility and compassion of its inhabitants,