伴
ハン, バン, ともな.う, とも
consort, accompany, bring with, companion
JLPT1 G7 S7 F886
As per
半
# (split) +
人
person → person who, with an *accomplice*/*associate*, splits off from a group → *accompany*; *bring with*; *involve*.
[Full Kanji Etymology List]