@LordTrollbias
Don't forget too, they're supposed to be 18. Not exactly saying that's the pinnacle of maturity, but if you combine their being 18 at time of death, plus the 5 or so odd year they've been alive as Arjen and Arien, they'd be in their 20s. Not expecting them to be that mature, but at least not so stupid. Plus their reincarnation hasn't been mentioned since, so it's a useless plot point that we're supposed to remember to 'excuse' their 'maturity', even though they're sorely lacking it.
Don't forget too, they're supposed to be 18. Not exactly saying that's the pinnacle of maturity, but if you combine their being 18 at time of death, plus the 5 or so odd year they've been alive as Arjen and Arien, they'd be in their 20s. Not expecting them to be that mature, but at least not so stupid. Plus their reincarnation hasn't been mentioned since, so it's a useless plot point that we're supposed to remember to 'excuse' their 'maturity', even though they're sorely lacking it.