username meaings

Sparda is dux_atrum, which is Latin, it translates roughly to Dark (or gloomy) Duke, dux being "duke" and atrum being "dark.gloomy"

All gloom and doom

Eva is domina_illustris, it's also Latin, roughly Bright (or Light) Lady, domina being "lady" (as in lord and lady", and illustis being "bright"

Such a cute pair. Dante, shut up

Trip is tripthroughtime, and given that he works for Time Force and they make use of time travel, it seemed appropriate

also puns

but yes, Sparda and Eva were designed to match xD