It sounds like you're describing a complex personality with multiple traits: apathy, an exordium (or perhaps you meant "exorbitant"), the ability to read people's intentions, and a pragmatic optimism.
While there may not be a single term that captures all these nuances, you could describe such a person as a "cynical pragmatist." This phrase suggests someone who may appear detached or apathetic yet possesses a realistic outlook, the ability to understand others' motives, and an underlying optimism about practical outcomes.
If you’re looking for a more playful or specific term, you could create a contextual phrase like "detached empath" or "strategic idealist" to convey the mix of traits you described.