Just that chances, that it is just a admiration as girl in question wasn't sure herself, are high.

The response is off-handed for comedic effect, not to suggest actual uncertainty. You can go ahead and read it as "Yes, I am a lesbian."

First come I; by name, AMACHI.
Chairman, President, Dean: watakushi.
I am the academy's sole official.
Right leg: real. Left: artificial.

My students I with sabres furnish,
And bid them by their wielding earn it:
Whether money, power, fame—
I grant it all, in Tenchi's name.

Their unconcluded dreams of glory
Await the sign for Hoshitori.
Maidens, warriors, hear the knell
When Miyamoto rings the bell.

That blade, ambition, cuts both ways:
For some it kills, for some it saves.
A gale-speed sword strikes epaulettes;
Tanpopo Garden pays its debts.

This school I rule has one firm law:
Here, a student's will is all.
If you find my pedagogy bizarre,
Then step right up, and take this star.

Fukuzawas are 10,000 yen bills, which feature the face of Fukuzawa Yukichi. 20,000 yen is around $200/€150/£125.