他 = 亻(person) + 也. It originally meant 'other / another' (anyone else, over there), and only later narrowed to mean specifically 'he'. The person radical 亻tells you it's about a human.
Spoken Chinese is wonderfully gender-blind: 他 (he), 她 (she), and 它 (it) are ALL pronounced exactly the same — tā. You only tell them apart in writing. So when you hear someone speak, 'he' and 'she' sound identical — context tells you who. 他们 (with 们) means 'they'.
A person (亻) plus 也 — pointing at some other person: HE.
他, 她, 它 (he, she, it) are pronounced identically (tā). Chinese speech makes no sound distinction for gender — a feature that surprises every learner.