伴 is built from the 亻 (person (left)) and 半 components.
It reads ハン like 半, as do 判 and 畔 — learn 半 once and the family's reading comes with it.
A common word using 伴 is 伴う (ともなう), meaning “to accompany, to bring with”.
Kanji that look similar include 伯, 伸, 伺, and 似.
