i kind of always imagined essaerae gets to see baako again when she finally passes away like nearly a millenia later and that he's kinda there as a guide to the afterlife; then they wait for laverne at the gates for when he's supposed to join her in death
Baako: "Why do you want me to go to the dance with you?"
Essaerae: "Uhh because..everybody else in this school is female or too old? And hey, we're friends."