Friendly/affectionate — quick to become attached or show affection toward people (often written 懐っこい).
その子犬は人懐こくて、すぐに膝の上に乗ってきた。
The puppy was so affectionate that it immediately climbed onto my lap.
彼女は誰にでも懐こい性格だ。
She has a friendly personality and warms up to anyone.
懐こい子どもは初対面でも話しかけやすい。
An outgoing child is easy to talk to even on first meeting.