A) What is your pre-battle speech?
First Stage:
Mother...? You've come to save us from our salvation? Won't you please leave while you prepare for our cleansing of all our sins? Why must you disobey and alter destiny? Listen to mother as he will be our one true savior from this wretched world we call home!

Second stage:
SAVE ME!!! [Normal side kicks in but is immediately shifted back] No..! No...! She will not be free! She will see how this world is going to turn from a dystopia to our utopia! Whether you live to see this glorious change is in my hands! [a bright orange glow appears and grows transparent wings]

Final stage:
Goddess...I...I can feel your power burning into my body! ...! NO! SAVE ME FROM HER WRATH! <holds head with both hands> SAVE ME! SAVE ME FROM THESE REBELLIOUS FOOLS! SAVE ME FROM MOTHER! SAVE ME FROM THE GODDESS! [slowly rips out from human form, leaving an unconscious body as its real form escapes its host and turns into a sexy female figure] Mother...It's time. No one can hear your screams except for me! I'll show you the hell I been through and created!


B) Where does the battle take place?
Stage one: An elevated subway station platform on a full red moon.
Stage two: Platform revealing to be the top of an actual train moving at high speeds in a mountainous area.
Stage three: Scenery changes once again to a platform with lava surrounding the platform and spikes with eyes all over the walls. (Think Darkstalkers)

C) What is the battle theme song
www. youtube.com/watch?v= plgSQ_G9USk


D) Wining/Losing quotes
Winning:
Hmph, I think I might just kill your sister and use you as sacrifice instead! Then you will be forced to see how THIS WORLD WILL CHANGE WITH YOUR OWN DOING! GAAAAAHAHAHAHAHAHAHHAHAAAAA!

Losing:
Mother...I see...the light...I'm free.

E) How did it come to this?
The protagonist's sister was supposed to be terminally ill and fell onto a heavy coma. Events leading up to this point revealed his sister upon being a host for a corrupt deity who wishes to change the world under its ruling.
The reason being this is because the deities who turn corrupt are displeased with how humans are treating their own world and feel its best if they forced to keep the world under their control. The protagonist fight not just for his sister, but to set order to powers gone off the deep end.
It also doesn't help that the possessed sister thinks the deity possessing her is her mother, and she's willingly commiting to these actions because she's under the possession that her mother is telling her that what she is doing is right.

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How the hell did I come up with all of THAT?! O_o No more Persona for me lol