Souseki's loss is unfortunate, but this raises a few questions:
1.
Did Suiseiseki knew the outcome beforehand?
-Some might say this is obvious, since Gin was able to single-handedly take both Sousei and Suisei at once, even without a medium in season 1. Now, by Gin having a medium, she's literally unstoppable.
2.
Do you think Sousei is regretting her actions?-Personally, I don't think she regret making the decision to fight in the Alice Game. Its like asking a patriot whether dying for their nation's cause is something of regret. Sousei probably knew that she might, (or most certainly,) lose against Gin.
3.
What do you think happens to Gin (for that matter, the Roza Mystica)?-This raises a number of theories that are still not completly answered even in the manga.
A. Sousei's previous existence in the Mystica just "dissapears"
-This theory assumes that unlike the manga, Sousei's previous existence has no effect on Gin. In otherwords, Gin just gets more powerful. Personally, this would be very sad since Sousei's existence is just "erased."
B. "Merging"
-Unlike the manga, this hypothesis assumes that Gin's personality and Sousei's personality merges to form a new one. Although, this seems to be very unlikely in terms of set character personality, it makes total sense if Alice is the (combined elements of all dolls thus,) "perfect" girl.
C. Manga alternative (spoiler warning of manga)
-In the manga, Gin gets both the Roza Mystica and Sousei's artifical spirit. Although, Gin never used Sousei's scissors in the manga, my personal assumption is that she could if she wants to. Just like in season 1, Gin was able to gain the ability to go into people's dreams, probably she gains the ability to use the 'scissors'. However, Sousek's Roza Mystica is not completly obaying her.
4.
So, does Gin get the Roza Mystica?
-It seems like it, since despite Sousei's wishes, Suisei is barred from being beside her. Obviously, Bara might come in to take it, but it seems like it automatically goes to the winner (which, would be an obvious contradiction to why Hina is still alive).
5.
Isn't Gin already too powerfull?
-Unfortunatly, unless something very debilitating happens to Gin, she's the most likely at this moment to reach Alice. Although, Bara was able to take on multiple dolls at once, she had some difficulty against Suiseiseki, once she got a medium. Gin however, has a medium and even without one, she's strong enough as seen from season 1. Now, if she gains more power by absorbing Sousei's Roza Mystica, I don't see how even Shinku + Jun could defeat her.
6.
Then, does the Roza Mystica go to Megu?
-I would hate to see Sousei's life be sacrificed for someone who's "ungrateful to be alive." Sousei's death deserves more than that.
Meanwhile, do you guys think the Mystica is "consumed" by doing this?
7.
Possibilities of what happens to Sousei later on?
-There are rumors saying that Sousei "will come back", since all her limbs are intact. Remember, Gin was burning but she came back alive.
The obvious joke would be, to have her come back on ep6 of the 3rd season.
Nonetheless, I think its a waste of a character after "surviving" for some 20eps.
Btw, that Gin + Bara tag is too strong.
Bara dominates the earth, while Suigintou takes the skies. Too bad Sousei didn't join the "winning team".
