人ひと当あたりの良よい

also: ひとあたりのいい

Meanings

1

expression, i-adjective (yoi/ii class)

Describes a person who is pleasant and easy to get along with; often used to characterize someone's demeanor or personality.

新あたらしい上じょう司しはとても人ひと当あたりの良よい人ひとだ。

The new boss is a very affable person.

愛あい想そがいい
愛想がいい emphasizes sociability and charm in social interactions, while 人当たりの良い focuses on the gentle, approachable impression one gives.
気きさく
気さく implies an easygoing, unreserved friendliness, whereas 人当たりの良い is more about a soft, non-threatening manner.

Compound of 人当たり (ひとあたり, 'impression on others') + の + 良い/いい ('good'). The phrase literally means 'having a good impression on people'.