I swear the "ima wa nai" and "mori no naka" echoes in Kioku no Mori are Keiko (esp. mori no naka), though a lot of people thought it was Kaori She's just singing higher/more cutesy (ie like during this performance of Everlasting Songs)
Eden. It's just such a happy song. It even lifted my spirits about going to school tomorrow. Another new battle song for when I have to face mean people/ bad things in my life. Yay