a beautiful game with one of the most synergy shared between all the characters, one and another. most likely one of the best character balancing in the entire series. they never, or barely acted cold/awkward to eachother which ties in amazingly with the past life theme of the game. to sum it up they're a big, comfy family.
Ruca and Iria are both endearing to watch the development of, from the beginning to the end. the contrast of Ruca's cowardlyness and Iria's mean girl act improves through the game, as she is supposed to make him man up. Iria is the heroine to give Ruca the courage he needs to face his fears and the events of their past lifes, which then Ruca gives that courage back to her as well. they're both kids, learning life's lessons and their own origins, and it's very emotional.
gameplay-wise, it's a 3D-LMBS game with literally none of the baggage 3D-LMBS games normally have, it's fun, snappy and doesn't get old so you know it's good.

Innocence, while short, has stellar storytelling, symbolism, characters, gameplay and skits, and I'd recommend it as a first entry to the tales series.