Rooster/Sagittarius and Dragon/Gemini meet at 52-57%, a cross pairing of the compulsive truth-teller and the silver-tongued charmer. One cannot tell a lie that sounds like a lie; the other can barely tell anything else. That gap defines the whole story.
The attraction is genuine: Dragon/Gemini's charisma is irresistible, and Rooster/Sagittarius's sunny, incurable optimism gives the Dragon a warmth flattery cannot buy. But the Dragon politely gives equal time to multiple love interests, and the Rooster's honest eye spots the pattern early and names it out loud.
Rooster/Sagittarius says exactly what it means, sometimes wincingly; Dragon/Gemini says what works, beautifully. Conversation is lively but asymmetrical: one is testifying, the other is performing, and both eventually notice the difference.
Trust is the whole battlefield. Rooster/Sagittarius has no talent for the white lie and less patience for hearing them, while Dragon/Gemini's habit of slipping away in the dark supplies fresh material. The Rooster's accusations land as insults to the Dragon's pride.
Dragon/Gemini could learn from Rooster/Sagittarius that unvarnished honesty is a luxury good, rarer than charm; the Rooster could learn a little Gemini tact, the mannered anodyne of kind phrasing. Whether either wants the lesson is the question.
At 52-57%, Rooster/Sagittarius and Dragon/Gemini are mismatched but possible. It works only if the Dragon commits and the Rooster softens; otherwise the honesty gap wins.