"I've been waiting. You've got some guts, challenging me on the night of the full moon. I won't let you lay one finger on that human!"
— Keine Kamishirasawa (Imperishable Night Extra Stage)

The 304-KK (Codename: Keine) is a twin engine, single seater, high speed, high maneuverability, tailless, fake delta wings fighter. Now what does a fake delta wing mean? It's simple, the entire wing is actually the main wing and the rear stabilizer blended in together in such a way that it looks like it's a delta wing. This jet was based on a character of Touhou 8: Imperishable Night, Kamishirasawa Keine (I can't pronounce her name without any error). Character wiki:

Keine Kamishirasawa is a were-hakutaku who acts as the guardian of the Human Village. During the events of Imperishable Night, she uses her abilities to conceal the Human Village from the heroines. She shows herself again in the extra stage on the night of the true full moon, having assumed her hakutaku form.

Personality
Keine is loyal to her duties to the Human Village, both as a schoolteacher and as its guardian. As a proper teacher, she doesn't like people who are discourteous, but other than that, she is generally friendly towards humans - except, perhaps, for when she has assumed her hakutaku form.

Eating and creating history
Keine possesses a different ability for each of her forms. In human form, she can "eat" history, as she did in the events of Imperishable Night. Though it is stated as "eating", it is clear that she is only concealing history from outside viewers. In her hakutaku form, however, she is able to create history; she is also apparently aware of the entire history of Gensokyo in this state, according to her official profile.

Hieda no Akyuu, however, states in Perfect Memento in Strict Sense that the Hieda clan's history is above Keine's powers, and is thus not "hers".

Occupation
Keine spends her days as a history teacher in a school in the Human Village, but also acts as its guardian, as she did in Imperishable Night.

Jet's performance: Roll half a circle in half a second, pitch half a circle in ~5.5 secs, decent minigun.

Activation groups:
AG7: Canopy

VTOL down for flaps, trim for trim.

Have fun!