Protect the Visitor?

The Jovians have sent a peace emissary over to the Nadesico- Yukina Shiratori, younger sister of Tsukumo. However, peace is the last thing on Yukina's mind- she plans to assassinate Minato, the 'savage Earth woman' who 'corrupted' her brother! And with the Nadesico about to arrive back on Earth, how will Nergal and the UEAF react to there being a Jovian aboard the ship?