Yuumi's ship looks like the CVN-65 Enterprise and Space Battleship Yamato had a child together!
It looks like something a Marine would design... Seriously.
The only problem I have with it are the straight flight decks. I think even with a spacecraft carrier there's going to be a need for an angled deck for the same reasons they have on the supercarriers of today. The aircraft are just too big, too heavy, and approach too fast for an axial (straight) deck to work!
(Hypothetical World War II scenario... COULD there have been fewer casualties and aircraft accidents IF the carriers back then had angled decks??? I've seen far too much film of old prop planes smashing into each other on straight deck carriers and even plowing into the island!)
Even if there is no air in space and no significant gravity, there are still significant masses involved. They don't come to a stop without significant braking and barriers/trapping cables. You'd have the same problem as in an atmosphere but multiplied by many times even at relatively "slow" space velocities like 3,000 mph.