Here are four Arkestran adoptables that may be claimed by watchers (including new watchers) for free.

Caden - The mint Arkestran healer, mint fur, pale cyan feathers, mint mane, raptor tail, cyan eyes, and mint antlers.
Soris - The grey Arkestran merchant, grey fur, light grey feathers, red mane, regular tail, red eyes, and blue antlers.
Arkarus - The orange Arkestran Cloudfinder, orange fur, red feathers, pale red mane, plumed tail, blue eyes, and giant demon horns.
Iruven - The deep blue Arkestran Ritual Performer, deep blue fur, very pale feathers, plumed tail, black antlers, black eyes, will o' wisp mane, and will o' wisp wings.

Status:

Caden - Unclaimed
Soris - Unclaimed
Arkarus - Claimed by  zespaghettistar
Iruven - Claimed by  zearo8

Terms:

You must be watching me to claim one of these Arkestrans.
These adoptables are free. They may be claimed without payment or art.
You will need to comment to claim your Arkestran. Please include the name of the Arkestran you are claiming.
You may only claim one Arkestran adoptable.
You may use your Arkestran adoptable as you wish.
You may sell or trade your adoptable.
You may rename these Arkestrans.
You may alter the design of these Arkestrans. Try to not alter too much however.
Please include the word "faerie" in your comment to indicate you have read the terms. This is required to claim your Arkestran adoptable.
I would appreciate it if you credited me for the design. This is not required however.