Character name meanings! This looks fun.

Prefacing with: I cannot remember where I managed to dig up a translation of the specific kanji used for Naoki's name, and I would have to do the same for Yusuke or Shinji.

Claudia: That'll be a feminine form of Claudius, which I think means 'lame.' Probably it means her parents thought it was cool-sounding and fairly unique.

I could actually find those for you on jisho later

Naoki I can't explain without also covering his sister, as I looked it up after realising Naoki and Saki's given names have the same ending kanji. Hers is something like 'short chronicle' and Naoki's is 'long chronicle.'

right now though I'm about to eat supper

HE WAS ALWAYS GOING TO OUTLIVE HER

No worries, Bii.

I can see Naoki eventually naming a kid Saki but written completely differently because he's not going to do that to a child.

Shinjiro: Again, I don't have an exact translation to hand, but I know from Behind the Name that '-ro' is usually 'son.' And 'shin' (as in Megami Tensei) can be 'true.'

I like 'true son' even if he can't see something that positive attached to himself.

Hifumi I don't need a translator for, she's literally 'one two three.'

Her mother's name doubles down on the theme and is written 'three four.' The way I've written her mother, Hifumi's name means 'aha a piece of my legacy to use for my own ends.'

Crowley... I am honestly not sure I could look up anything useful for. He picked it himself, after his angelic name was taken from him and he spent a while stuck with 'Crawly.'

Arachne Charlotte Dowling wanted to be a spider when she grew up and is living the dream.

'Charlotte' doubles down on the spider theme while balancing the drama of 'Arachne' nicely, and most other fictional spiders are male (Boris), even MORE dramatic (Shelob) or both (Aragog).

Also Boris is squashed within two minutes.