Complex sentence: Yuuko hinted that Watanuki and Kohane's bond is strong or rather their hearts are closer than anything, suggesting that Kohane may have an integral part in Watanuki's Hitsuzen.
Split into simpler sentences: Yuuko hinted that Watanuki and Kohane's bond is strong or rather their hearts are closer than anything. Suggesting that Kohane may have an integral part in Watanuki's Hitsuzen.