Ah, a post-molt Grea before she cut her hair...I'm all about that life. Dragon girls forever. Anne and Grea are very obviously into each-other. Anne may seem the thirstier of the two, but that is only because her general personality is more outgoing and open. Grea is shy and easily embarrassed (which only adds to her God-tier waifu status), which is why she finds it more difficult to express herself. However, probably the most telling scene in the whole anime is when Anne trips on the boat and lands on top of Grea. They are both locked in a romatically compromised position for a moment and neither seems to want to leave it until they both slowly withdraw, suddenly self-conscious. Last time I checked, people who are JUST friends don't behave that way. Just saying.