The muse, DDR champion, buff management frame - Octavia!
Release date: 2017-03-24
Passive: When casting an ability, Octavia grants herself and allies within 15 meters the Inspiration buff, generating 1 energy per second for 30 seconds.
Mallet - Rhythmically beats damage into nearby enemies and draws their fire. Damage inflicted on the Mallet increases its lethality.
Resonator - Launches a rollerball that charms foes to follow it. Combines with the Mallet to create a roving ball of sonic destruction.
Metronome - Grants buffs to those who consistently perform actions in time to Octavia’s music. Timed jumps offer the Vivace speed buff. Crouching on the beat grants cloaking with the Nocturne buff. Firing rhythmically bestows Opera multishot buff. Timed melee swings give the Forte damage buff.
Amp - Draws power from the decibel level of sound in the area and uses it to amplify a damage buff for Octavia and her allies. It also doubles the damage and range of nearby Mallets.
Acquisition: Main blueprint and the Mandachord are acquired from the Octavia’s Anthem quest. The Chassis blueprint is rewarded from the Music Puzzle on Lua. The Neuroptics blueprint is rewarded from Rotation C of Terrorem (Survival), Deimos. The Systems blueprint can be found in the A Rotation Cache of Plato (Crossfire Exterminate), Lua.
Probably one of the harder warframes to farm because a blueprint is on a Rotation C mission. If you see her as a reward for the Duviri Circuit it can save you a lot of bad RNG trying to get her Neuroptics from a Survival mission.
Her abilities make most difficult missions doable even while solo, and my favourite use for her is to use Mallet to quickly spawn a Sister of Parvos. Her kit is pretty versatile giving mild CC, damage, invisibility, and even energy regeneration which can also be granted from Octavia Specters.