Maeve

Maeve was a human Titan Guardian of the Vanguard. She was part of Shaw Han's fireteam in the Cosmodrome, along with Caster-3.

She was killed by Navôta, an Eir Spawn, during a failed strike to eliminate a Hive Wizard. Accounts differ on whether the attack happened in the Cosmodrome or in the Lunar Complex.

Maeve's Ghost and Learning Light

In the Schism mission, Maeve's Ghost is broken into pieces. Collecting them finishes the mission, and picking them up starts the Learning Light quest. The first step is to speak with Shaw Han at The Steppes in the Cosmodrome, which rewards a Rare Sniper Rifle. The quest continues through the Refracted Lesson mission, then a step with Ikora Rey at The Tower.

Maeve's Key and Maeve's Stash

Shaw Han's Exotic section sells Maeve's Key. Reports differ on whether it costs anything. Maeve's Stash is in the room near his landing spot in The Steppes. Use the key on the stash chest to get the Exotic shotgun Tractor Cannon.

The Key For Free triumph is claimed at a Monument of Triumph after opening the stash, and it grants 10 Legendary Marks.