Sena has had way more developments. Also theme-wise Sena represents the future, moving forward. Her personality's also like that. Yozora represents the past, and her attitude reflects that; she wants a return to when she and Kodaka were Sora and Taka.
What Yozora needs isn't Kodaka. If she gets him, then it just gives her justification and a stronger anchor to keep herself stuck in the past. She needs to move on from some idealized fantasy relationship fabricated from her past experiences and learn to create new relationships.
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NYAA-CEPTION
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