(online gaming, slang) healer who heals random players

(video game) character that responsible for healing party; healer

active participation / being active / being energetic / being lively / being thriving / being successful / flourishing / making a big contribution / playing an active role / making a great achievement / contributing greatly / being productive

to be active (in), to participate actively (in)

team

(colloquial) a girlfriend (a female partner in a romantic relationship)

(formal) Female third-person singular pronoun; she, her, girlfriend

(literary) they (about women or girls)

a sports team which not run by the company, but by the organization of like-minded people in the local community

teammate