phoenix and athena naturally getting along because they're both feelings-oriented people who are sensitive and thus tend to emulate or adapt to others so that everyone has a good time (vs trucy and apollo who are a bit sharp and stick to their own style). phoenix in aa5 who's a little on the high of that dynamic and happily teases apollo with athena's help. phoenix who gets a little too comfy with it, who takes apollo a little for granted because apollo always takes them in stride anyway. apollo who leaves and phoenix's little mental house just crumbles