This is a rush write up with no depth just now. It's a starting point!
I didn't build my headmate's world terribly deeply as they came from various stories - incomplete ones - I wrote over years.
They hang out via Tupperbox on Discord - though most of their time is in private servers at present. This means that parentage of cubs is odd as they have their origin canon stories with different parents to what happens in roleplay :)
Many of my headmates took on other characteristics because…they could!
So the mech yachts and were cars have multiple robot style arms, dendrites - Ratbat style - and oddly, wings. Yeah…makes a strange image. If you imagine the Superyachts in particular, 2 sets of huge wings that fold tremendously away, also large major robotic arms that can, between them all, allow the craft to crawl on land. It's not their native place of course, so they don't have great dexterity!
The Aktarians express dendrites at need.
Aktarians are an immortal race of starships who were originally created by the beings who caused all of reality to exist. They're overpowered to a degree that makes them unworkable in any combat related fiction - they were not intended for that role. However, they're RP headmates now. Note: Katiya and Lia are skilled full Tulpas who function and front in the real world. Kat is operational in the real world, randomly. See that as you will.
Then I have Rakza who is a Were-car out of a rather fun yet ridiculous story I wrote in 2015. A result of an experimental virus that really doesn't make sense but let me make a daft story. He has two cubs by two different females.
Note on eyes or other facial features: my mech characters don't natively need eyes however they are all capable of usig holographic or magic projected eyes, usually over headlights or windows (car or boat). Disturbingly Kazia's and her children can move them between any windows, portholes or bow and even change the colour or count. Their purpose being to aid in connection to others and convey expressions however. Though eight or more giant eyes appearing at the windows of a superyacht is a mood.
Kazia was a mech superyacht who was accidently brought to life via the greed of her owner.
She has extensive nanotech and developed picotech, since patented and earned a fortune from it. She had three cubs, all of whom have chosen to grow to an overall length of 500 foot and added tremendous great wings for reasons unknown. So across my headspace I regularly see the peculiar sight of gliding trijet superyachts who broke the sound barrier to get lift. Go figure.
In addition to wings, they use their picotech and nanotech to create dendrite arms at need though they all possess four much sturdier mech style robotic arms, folded away into their hulls when not used.
Kazia changed herself to allow partnering with Sterling Superyacht and had two more children. These are a few months old and are winged like Mommy is.
Arizona is a hybrid headmate who came by way of a real life Skyline and a character from one of my stories. In that story she's the avatar of a death spirit Goddess looking for companionship and took the form of a car.
The real life car was a drift car I fell for but couldn't buy. This resulted in a strange character whose introduction to our server was a rather odd obsession with quills - found on the phallus of Amrian and some other mech species.
She has two children, one by a Greater Amrian known as Amari and the other by another Skyline who still dates her now.
She's a Divinity, the Goddess of Life and a tech mage and so are her cubs.
Cybercity Quadra rs-v who is not meant to be a tulpa but is. He's 18 and likes playing with the cygnets.
Father to Marten and Sofia by way of Khalihah superyacht. Nope, scale wasn't an issue 🤣.
In form, a Lamborghini Sian cabriolet, a sort of light cyan in colour. She has two children, Ezekiel and Fiamma. She is of Italian noble descent and also a fire mage. Her children have inherited this latter trait.
These are not tulpas but me when I split my soul metaphorically.
Has produced too many cubs and cygnets now.
Oversized winged wolf with a jet cub in another host's headspace.
Edit to reset timer. As I get older, my headmates seem more natural, though quieter.