And then we have a Christmas Cake.
A very desirable yet still a Christmas Cake.

That's our Ashigara: that vibe 'bring it on', straightforward woman and belligerent kind of.

Follow-up tweet from Feesu:

軍人達が帰った後、足柄さんじゅうななさい（仮名）は人生を左右する決断を表の顔「生徒会長モード」で応じた事を「あぁ…私の馬鹿！またやっちゃった…」と後悔し、招集の日まで残り少ない青春を謳歌しようと動き出します

Frawnkenstein said:

Follow-up tweet from Feesu:

軍人達が帰った後、足柄さんじゅうななさい（仮名）は人生を左右する決断を表の顔「生徒会長モード」で応じた事を「あぁ…私の馬鹿！またやっちゃった…」と後悔し、招集の日まで残り少ない青春を謳歌しようと動き出します

Sounds like Ashigara, alright?

To think a student council prez would become the Ashigara we know and love

Frawnkenstein said:

Follow-up tweet from Feesu:

So basically in Feesu-verse, Ashigara was a regular high school student who agreed to be transformed into a shipgirl?

CompassRose said:

So basically in Feesu-verse, Ashigara was a regular high school student who agreed to be transformed into a shipgirl?

I think it's implied so far that the transformation happens naturally and the device simply tracks the (potential) development. It says that Ashigara still gets to enjoy what's left of her high school years, so I assume that also includes the graduation which she may as well be close to.