I know this is fantasy - and the fact that this has already happened years in advance in terms of the LN - but building a bridge to all four corners will destroy whatever ship lane monopoly exists on the island.
The obvious solution is to raise up Mars as the primary deity of this era; a new temple dedicated to Mars with Griffon statues to guard it to make full use of the propaganda being unwittingly spread.
We just need the cute nicknames now. Gojo probably won't be able to get to saying "Marin" without bursting into red, though I wonder if he might be able to use her "cosplay" name "Marine". I can totally see Kitagawa making something like "Wa-kun-na" or even pushing it to "Wa-kyun"
Tanaka's name (田中) translates as "Centre of the Paddy". "田" in particular means "(rice) paddy" in Japanese, but in Chinese, it represents "field" or "cultivated land". I take it by her own description that referring to herself as "Gaia's Counter Force" means that she is the/an embodiment of...