As library access and some other aspects if covenant life are based on seniority (full members > provisional members > apprentices > guests, and tiebreakers in order of charter signature), seniority is as follows:
Justinius of Tremere (full member)
Aislinn of Tytalus (full member)
[strike]Maribus of Mercere (full member)[/strike] Passed away, summer 1220
[strike]Lamentus of Criamon (full member)[/strike] Final Twilight, winter 1221
Leona of Bjornaer (full member)
Liliana of Merinita (full member)
Attravere of Mercere (full member, winter 1220)
Aequi of Criamon (full member, spring 1220)
Sophronia of Tremere (full member, spring 1221)
Tabanus of Jerbiton (full member, winter 1222)
Iapetus of Flambeau (full member, summer 1222)
Rhodri of Verditius (prov. member - winter 1220; disappeared in Spring 1221)
Sinmore of Flambeau (prov. member - spring 1220)
Cygna of Bjornaer (prov. member - spring 1221)
Hiems Ex Miscellanea (prov. member - spring 1221)