Sagittarius is a sign that thrives on challenge, whether in his work or personal life, and claustrophobic energy of any kind will surely send them packing. When we first meet Jack's colleague and soon-to-become best friend Miguel Rivas (Jon Huertas), he is an up-and-comer who thrives at the construction company where Jack has a much harder time integrating. Miguel is personable and approachable, as well as direct and honest, Sagittarius traits that make him a great salesperson as well as an excellent confidant for Jack.
It's in his relationships, though, where the Sagittarius tendency toward boredom comes through, resulting in his first marriage ending abruptly in divorce. Decades later, Miguel and Rebecca reconnect long after Jack's death, and they fall in love. With Rebecca, Miguel gets all the excitement and drama his Sagittarius spirit can handle, thanks to her strong-willed personality. However, this includes all the tensions that arise between him and her triplets when Rebecca and Miguel get serious about their relationship.
Finally, Miguel can settle down and, in many ways, sublimate his desire for change in his devotion to making Rebecca happy. He also makes it his mission to win over the Big Three by using that Sagittarius hunter spirit, and eventually, he does proves himself to be a vital member of the Pearson family.
