The so called "seal" sister

Now, if any of you are lore junkies like me for this game, one: you know summoners rift doesn't actually exist anymore in runeterra and majority of the "interactions" champs have in game, are just made up based on what would probably happen if they met, but really most of the champions have never seen one another ever. But thats besides the point, two!: if you've read about ornn you know that him, volibear, and Anivia are demi-sibs. But you also know that in ornns story, it said something about a fourth... Ornn, Anivia, Volibear, and an unknown seal sister. I for one want to know more about this unnamed and unknown sister of theirs. I mean, they can't juat leave everyone like that with that little message and not go any further with that. Is said seal gonna become a champion like them in the future? Are they gonna expand it when volibear gets his rework? Or (if they go for what I've been wanting....) Are they gonna finally give Anivia a short story or something so that we can learn a little more about her than what her damn bio says, and have the seal in it? I want to know! Cause I find it pretty cool that they're is a little squad of powerful elemental demi's that basicallly govern the elements that basically make up the freljord. Ornn governs the earth and lava that created the mountains, Anivia basically controls snow and ice that is 90% of the region, and voli harnesses the power of the storms. So it's awesomme to see that there's someone that use the waters around the freljord to give it it's name as well! Hopefully they do give something in the future to give some more about this. Out of all the regions that one appeals to me the most, mostly due to how that land is just pure crazyness. Second being shurima cause meh, why not, and third being bilgewater cause pirates. Just pirates.