My anime harem gaiden.

The next two books involve Arron McGee Going to the tenchiverse with his harem and military he will face kagato and join tenchi in a quest to defeat him.

The characters will be.

Arron McGee the MC

Cagalli yula attha,

Boa Hancock,

Ayeka misaki jurai

Rei ayamano,

Honey kitsuragi

Akiza izaniski

Shion uzuki

Excellen browning.

The tenchi characters will be.

Tenchi Masaki.

Ryokan hakubi

Sasami Masaki jurai.

Mihoshi kiramitsu

Washu hakubi

Kazuhito Masaki /yosho Masaki jurai.

Seto Masaki jurai

And

The villan kagato

Each girl is given a power armor ring witch gives them the armor of the fallowing super robot.

Cagalli= DaiZyu-Jin

Hancock=Soulgain.

Rei= Dai ren-Oh

Ayeka=Laldaboath

Also the mechs will play a role as fighters in space battles I'm also going off canon and suggesting that kagato has developed military fighters of his own craft.