The convergence rail — each principal's debut position on the Ch. 1–140 spine. Bars begin at first meaningful presence.
Riven
S1 Ch.1 · Founding Cell 9
Arelion
S1 Ch.1 · Founding Cell 9
Scribs
S1 Ch.1–3 · Founding Cell 9
Vaughn
S1 Ch.1–3 · Founding (ambient)
Nia
S1 Arc I→IV · Seeded Ch.1, active Arc IV
Sanaa
S1 Arc I→III · Rumor Ch.4, appears Arc III
Gingey
S1 Ch.5→35 · Drop-in; joins finale
Amelia
S1 Ch.35 · Paper Arc II; arrives epilogue
Asha
S1 Ch.35 · Omen Arc IV; arrives epilogue
Yahia
S2 Ch.36 · Teased S1; arrives S2 premiere
Ixtli
S2 Ch.40 · S1 unnamed; turns Arc VII
Kaisel
S2 Ch.66 · Watcher all S2; joins finale
Lysandra
with Kaisel → · Art-canon; placement pending
Elara
S3 Ch.71 · S3 Vashkarath
Seraphine & Maribel
S4 Ch.108 · The buriers arrive
Celestine
S4 Ch.121 · The Lantern comes late
Lunari
S5 → · Quiet Allies
Kirshino
Mentor → · En route to 304
Adair
Mentor → · En route to Earth
Twilight Order