Though he chose men, having essentially been raised as an elf, it's assumed that he retained many elvish characteristics (as Arwen does later on.)) ... And Aragorn was one of these descendants of Elros, so he does technically have some elvish blood.

Are Aragorn's children Half-Elven?

Eärendil and Elwing begat another pair of twin sons: Elrond and Elros. ... Aragorn and Arwen were parents to a son, Eldarion, as well as at least two daughters, thus leaving a remnant of the proud Elven lineage even after the Firstborn had long passed over the sea and out of time and memory.

Is Legolas a half elf?

As a son of the Elven-king Thranduil, who had originally come from Doriath, Legolas was at least half Sindarin Elf; his mother's identity is completely unknown. ... Like all Elves, Legolas had great respect and appreciation for nature.