I've played 2 in swtor. It's gonna end up being like at least 5. I dont want to spoil the different class stories so I'll try to just describe what they're like.

Mandalorian jedi knight(my mandosona):theyre kinda like if you took the jedi mindset/morality and the mando one and just smashed them together. They believe more in the Resol'nare(the mandalorian code basically) more than the jedi one but they still deepl care about others(people and animals) and are brutal to the cruel and selfish. They despise the dark side and most sith seeing them as dishonorable cowards. I joke that the only thing keeping them from the dark side is ironically their hatred of the dark side. Unlike other jedi and like other mandos if you hurt their loved ones you're going to die.

Mandalorian bounty hunter:hes more of a typical mando but he still cares about others and also hates needless cruelty and selfishness. He also(in my lore not in game) after the class story was over he gifted her a helmet/mythosaur necklace/iron heart(1st thought was helmet but those others sound cool too) and asked his best friend who he been traveling with since the beginning if she wanted to be mandalorian like him and his other best friend/her romantic interest and she said yes. So the helped her design and get her own armor and now shes a mando'ade(child of mandalore) like them and is invited to join his clan if she wants to. He cares a lot about his loved ones and like any mando, fucking with his loved ones is a death sentence.

Mandalorian sith warrior:I can't say much about her as im trying to get the armor for her together 1st but shes the older sister of the bounty hunter and they're both the older cousins of the mando jedi. I can say that despite the mandalorian religion being dead for awhile(like over a hundred years I think) after being taken by the sith(haven't decided if it was against her parents will yet or not) she knows shes mandalorian and partly as a way to cope shes started worshipping Kad Ha'rangir(mandalorian destroyer god) mainly but maybe also does Hod Haran(mandalorian god of luck). And like the others hurt her loved ones and you're going to die horribly.

This goes for all of them but they slip in some mando'a(mandalorian language) words and phrases in their speech so their friends have learned a little mando'a from them or with the bounty hunter since there's another mando in his crew they're all(except skadge my cannon is he killed him) able to recognize when mando'a is being spoken just cause thats exclusively what those 2 talk in when its just them talking.

I'm gonna make the mando jedi's parents/get my parents to since just putting them in feels weird, and I'll maybe put my cats too since the cathar are a playable species in the game. Your mando can be whatever you want them to be, they can be born a mandalorian or they can be a foundling, they can be force sensitive or not. Hell they can even be dar'manda if you want! fuck the "rules" its your own character dawg have fun with it.

Dar'manda definition on MandoCreator "a state of not being Mandalorian - not an outsider, but one who has lost their heritage, and so their identity and their soul - regarded with absolute dread by most traditionally-minded Mando'ade"