Personally, I don't really see the Kusarian in it, apart from that small fin on the back. I also wonder where the ww2 airplane is hidden, apart from the cockpit maybe.
It has something from Rheinland, Kusari, and something that reminds me of an Alien, Wilde ship maybe?
This Galaxy is vast; its wonders and beauty are almost unfathomable. But the galaxy also hides dark secrets, some of which have lain dormant since the beginning of time itself. There is a danger in secrets, both in seeking and in knowing. Some things are meant to be hidden from view. Some mysteries defy understanding, and sometimes even the things we think we know are untrue. Some secrets should remain untouched.
The Mamoru needs no replacement. It's fine as it is.
I like your ship. But it's Just not Kusari enough to be builded by Samura for the Farmers Alliance (mostly exclusive). To me it looks like a Sunbeam/Falcata mix with a Kusari tail. Renzu maybe?