Extra detail available here: https://www.weasyl.com/submission/1092763/say-hello-to-the-space-twins

Arani and Amo are one entity and two identities. They share the same form, but have very different personalities, viewpoints, opinions, likes and dislikes.

The older "brother" is Amo, a very intelligent yet unmotivated pilot, who takes the form of their tail. Arani is the more humanoid of the two, and she's younger.

They are Edwion, a photosynthetic race that protects and takes care of other plants in the universe.