They'd be in-between their KH1 and KH2 ages or just turned their KH2 age since 358/2 Days covers the time period of Chain of Memories as well which lasts 358 days then goes straight into the first 7 days with Roxas in KH2 so the events of CoM and 358/2 Days would last just over a year. At least that's how I think it would beJust look in the game manuals. Yeah, Riku is a year older than Sora, but Kairi and Sora are the same age xD
Riku was 15 in KH1 then 16 in KH2, and Sora and Kairi were 14 in KH1 and then 15 in KH2 ^^
Not sure about Chain of Memories and 358/2 Days though...
