You, your grandmother, and your father have discussed among yourselves what the best way to present this would be. By default, Dandeer is falling in line with your decision. After a lot of discussion, you concluded that the best thing to say is that...
[ ][FACE] ...your father possesses some vaguely-defined office, the limits of which only need be publicly defined in terms of his ability to make promises on behalf of the Exiles.
[ ][FACE] ...your family is a traditionally influential one, and your father in particular possesses an outright leadership position over roughly half your population.
[ ][FACE] ...you are hereditary nobility, your grandmother is the prior sitting Lady, your father is the sitting Lord, and you will yourself become Lady some day.
Ok. Out of the top of my head, there are six obvious ways this will affect us (there might be more but I just read the update).
This tells the Garenhulder humans a) How organized are the exiles and the conspiracy to hide them b) How much authority does Berra have to talk for the exile society c) How normal people can be integrated to our society d) how people will treat Kakara e) How governments will see our family f) what does it mean for the exiles
1) Implies an elected position that was probably created to deal with extraordinary situations like the invasion and negotiations. It makes Dad a diplomat and a general rather than a ruler. It means that our family might not always be as influencial and that while they can deal with him not for general things, they might try to sidestep him and treat ki users on an individual basis. The exiles would be united in their agreement to remain hidden but little else and dad is probably in front of congress because he is somewhat known in society and his cover is already blown. It means that normal people learning ki will think they need not to concern themselves with him and that the agreements he makes will have to be somewhat neutral towards the Garenhuld nations since he has to represent the interests of all Garenhulders and his deals will have to be more general. Kakara will just be a normal kid with superpowers which would make it harder to justify to others her having influence on the society or others following her orders. As for the exiles, they will be left to mostly interact with Garenhulders as individuals with humans. Governments will see us as a diplomat and they will see the ki users in their countries as people of their countries first, then exiles.
2) There are offices stablished since dad is outright leader of half society and we are similar to a country. The fact that DAD has the position means there is a chance other outside our family can have it or others but thanks to our influence, we will probably have it if we want it. There might be other rulers but Dad is right now the most important and influencial so he was chosen to deal in the name of others, what he says can be assumed to be followed and he can convince people to follow his lead so while in the future convincing him does not necessarily mean all society will follow, it is a good start. That means that people who want to deal with the exiles will want to go through him and curry favor so that he can talk them up and might want to make personal deals with him to get broad influence. Any government getting him on their side will have a good advantage over the others but the other countries might convince other families to help them. Our government style would rely on aristocracy. People will know our society has their own traditions and culture so they might feel a bit excluded and there might be curiosity about which other families are traditionally influential. It also means that normal people might come to us with petitions or asking us to intercede in their favor in front of the exiles. Kakara would be the daughter of a well off family and so would our siblings so marrying to us would be a good way to move up in society and get political capital, as would befriend us and she might speak as someone with influence but not outright authority which means that in negotiations you could trust what she says but can't make outright promises. Aramai would also get some prestige from our family living here. Exiles would still be their own people but half of them answer to Dad in some manner, though perhaps not outright loyalty.
3) We are a sovereign nation that encompass all the world. Whatever dad says, goes. People will be somewhat wary of mixing with the exiles if it means, perhaps, becoming beholden to other nation and the garenhulders will know that Exile loyalty goes to the exiles first, besides shitting bricks at the fact they don't know who is an exile or not. They would very much like the exiles to train their militaries in Ki use as a show of trust (they would always want this but in this case it is more pressing). Kakara will be further separated from other garenhulders and people will look at Berra working as a mechanic and go "Dude... what?". We would take some heat away from our siblings but not much. Kakara might become a price since whoever marries her will get a leadership position in the strongest nation on Garenhuld. Our family would be a bigger threat than as aristocrats since the most paranoid ones will think we want to take over. As far as negotiations go, this makes dad an equal (more than one) and people will be somewhat pissed that this was kept secret. There might be issues with people recognising the exiles as their own nation and any exile that comes out will be under some suspiscion from the authorities since Brandon can give them orders. An attack on us would be crippling if successful instead of hitting hard on morale as the aristocrat option would be or not doing much as the first one would. It might also grow a bit more complicated once Jaffur is released. Though it might be a good way to guarantee that the Goku Lords are always to public face of the Exiles, be it to the Garenhulders or the Aliens. There is also to consider how the Vegetans might take it: On one side they would be thrilled with nobles acting like nobles, on the other hand it might look like we are trying to oust the Vegetan leadership. It might also make Dandeer seeth inside.
[ ][ROLE] ...actively address the Congress. Your blog posts over the course of the year so far have achieved widespread recognition, your continued attendance at school has done a lot to normalize you in the public view, and you have a decent amount of capital. Plus, you're a thirteen-year-old girl; even by virtue of not being able to take you seriously, people won't think, "threat," when they look at you.
[ ][ROLE] ...answer any questions directed to you. You have no address planned, but you will be prepared to field any questions they ask. Better to keep the focus on your father, but there's no reason to decline all questions.
[ ][ROLE] ...just observe. You're not Lady yet. Your role in this is public relations, not foreign policy. You'll smile at reporters and write blog posts. Dad can handle the diplomats.
I won't make as an in depth analisis here but just say I am conflicted. On one hand, Dad is as good a diplomat as us and is better at intrigue and deceit. On the other hand, it is true we should have some capital since we are the ones that most visibly defended the school and we went the extra mile to look non threatening and approachable plus we also know we have traits that help with this and we are right now recognised as the public expert. On the third, ki formed hand, we are thirteen which might show our customs are different but unless we show ourselves as Brandon's heir it might make them think we are not taking this as seriously unless we absolutely awe them even if it would lead people to underestimate us it might also make people less willing to negotiate. It could also be looked at as a power play in making them negotiate with a child if we don't have an official position though the fact we are famous because of our blog at least makes us a somewhat known entity.
For the face option, I am leaning to influential family and role either of the first two though currently leaning to the first. Definitely not the first face option, I want to milk this for as much power as we can. We want to influence Garenhuld Policy regarding the aliens so we want to be seen as the ones who speak for the only effective defense they have against them. Also, depending on how we deal with the invasion, the different face options might give us different opportunities.