Andromedas

On the way of an intergalactic meeting, this prince's space ship got a faulty engine and crashed on the planet. While waiting for rescue, the prince decides to take a look around and shift his body to resemble more the inhabitants of the planet he crashed in. And since he's at it learn about them too, rescue would take some time to arrive anyways.

He has a moderate understanding of the language and habits of the inhabitants of our planet thus it is easy to interact with him. He has yet to understand the local humour though.

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After living on our planet for a while, Andromedas decided that being a prince wasn't as thrilling as living among so many species of dragons, so yeah, guess who's not going back to his homeplanet. Also, since he is not planning on going back on his princely duties, his bodyguard Rigel left the clan to start his new life as a free alien.

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Andromedas is the kind of alien that wants to be included in stuff if he sees people around him being excited about something even if he doesn't understand.

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TYPE A : always end up being royalty or related to royalty whether they come from the royal line or not.
It's uncommon for these types to be born out of type B or C or even D families ( mixed or not ) but when they are, the families recieve an "upgrade" by the Empire and basically becomes a potential mate to one of the future kings or queens or even the Emperor's child. The most fertile and rare sex, can impregnate and get impregnated. Also two A types have higher chances of having A type progeny but because royalty is royalty and they have rules, these couples can only procreate every 10 or so years.( they have minimum 3 babies in one litter with the max being 6, the rarest litter was of 9 ) (( forgot to add A types are the "perfect alien" so they are tall and suited for these large pregnancies ))

TYPE B : can be simple citizens,servants of the palace or even nobles. Their body is more "masculine" and muscular thus can take heavy duty jobs. They can only impregnate but rarely can get impregnated. (litters are normal, 1 to 3 babies per litter. this goes for C type too )

TYPE C : just like B types, they can be citizens, servants or nobles except their body is more "femenine" and usually take on medium to light duty jobs. They are the polar opposites of B types; can only be impregnated but rarely can impregnate

TYPE D : they are the biggest percentage of the population and they are always citizens with some exceptions being high rank servants in the palace ( like a conseullor for example ).
They are phisically the smallest and weakest of the 4 sexes, but they usually make it up with brains.
They have the lowest fertility and and rarely can get impregnated with an even rarer chance of impregnating, due to this, they have a history of being emarginated for being weak and useless for reproduction; to the old-fashioned and rotten-minded, they are failed aliens and proof that mixed blood families only create runts.

Prengancy lasts 6 months and once the babies are born the aliens are pretty much ready for the next litter since they go through heats every month ( type As ) every 3 ( type B and C ) every 6 but very weak ( type D )
Type B-C have more freedom when it comes to procreation unlike type A who have a rule of making babies every 10 years ( which btw a year consists of 18 months in their homeplanet )
Type A / Type B|C pairs ( royal and noble which is unusual; happens only when A types are scarce or because a noble does something outstanding or simply catches the royal's eye ) have a "procreate every 5 years rule".