Description from original post (created 2016-05-08 11:57):
Riksis:
Archons are revered amongst the Fallen. It is unknown whether these high
priests are the caretakers of the Prime Servitors, or simply vicious
arbiters of the Primes' will.
Riksis collects the skulls of dead Guardians. Whether he keeps them as
trophies or presents them as offerings to whatever Prime he serves, his
threat is very real, and his death will bring great joy to a City in
need of hope.
Draksis:
Draksis, Kell of the Wintership Simiks-fel, has been an elusive target
for the Vanguards. After his countless raids on jumpship reclamation
convoys, Cayde-6 personally upped the bounty on him. With confirmed
sightings of the Kell in the Ishtar Sink, the time to strike is now.
Defeating Draksis could throw Winter into chaos. With Simiks Prime
allegedly already lost, the House leadership would be gutted - although
proof of the Servitor's demise remains elusive.
Source:http://db.destinytracker.com/grimoire/enemies/fallen-leadership