>>14021103RRats or not it's clearly not a coincidence that
1) the one with the hag model is a hag who likes 'japanese 30 year old boomer' stuff like TTGL and Kishidan
2) the one with the loli model has a loli voice
3) Chloe is a fusion of all kinds of cute girls
4) Koyori is a ditzy cute girl that appeals to nekomimifags
5) Iroha appeals to weeaboos/japanese people who want more Japanese stuff
All of them have really specific niches and voice actresses seem to have been chosen specifically to fill a niche.