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Siryn (Marvel) — First appearance, key issues & comics · Cape Zone

Siryn portrait

Character/Marvel

Siryn

Theresa Cassidy

446 appearancesSince 1981

Siryn first appeared in Spider-Woman #37 (1981-04), published by Marvel. 446 appearances are indexed across 60 series.

Also known as Theresa Cassidy

Alias used by Theresa ‘Terry’ Cassidy.

Character history

Key issues

4 issues

Spider-Woman#37Cape Archive1981
Spider-Woman
#37
first appearance
1981-04-00
X-Force
#31
origin retold
1994-02-00
X-Force
#34
origin retold
1994-05-00
X-Force
#83
origin retold
1998-11-00

Across the catalog

Appears in

60 series

X-Force
1991–2002
85 issues →
X-Factor
2006–2013
54 issues →
XCape Archive 2007
X-Factor

2007–2013

16 issues →

Deadpool cover

Deadpool

1997–2002

11 issues →

The Uncanny X-Men cover

The Uncanny X-Men

1981–2011

9 issues →

Fallen Angels cover

Fallen Angels

1987–1987

8 issues →

Cable cover

Cable

1993–2002

7 issues →

What If...? cover

What If...?

1989–1998

5 issues →

X-Man cover

X-Man

1995–2001

5 issues →

DCCape Archive 2008

Deadpool Classic

2008–2019

5 issues →

X-Force Epic Collection cover

X-Force Epic Collection

2017–

5 issues →

Uncanny X-Men cover

Uncanny X-Men

2024–

5 issues →

DCape Archive 1994

Deadpool

1994–1994

4 issues →

Cable / Deadpool cover

Cable / Deadpool

2004–2006

4 issues →

DECCape Archive 2021

Deadpool Epic Collection

2021–

4 issues →

XBPCape Archive 2021

X-Factor by Peter David Omnibus

2021–2025

4 issues →

X-Factor cover

X-Factor

1986–1998

3 issues →

WFCCape Archive 2008

Wolverine: First Class

2008–2010

3 issues →

SCape Archive 1978

Spider-Woman

1978–1983

2 issues →

Marvel Age Annual cover

Marvel Age Annual

1985–1988

2 issues →

X-Factor Annual cover

X-Factor Annual

1986–1994

2 issues →

Wolverine cover

Wolverine

1988–2003

2 issues →

Marvel Comics Presents cover

Marvel Comics Presents

1988–1995

2 issues →

The New Warriors cover

The New Warriors

1990–1996

2 issues →

Show all 60 series ↓Show less ↑

X-Force Annual
1992–1994
2 issues →
Generation X
1994–2001
2 issues →
NXCape Archive 2001
New X-Men
2001–2004
2 issues →
New X-Men
2004–2008
2 issues →
X-Men
2004–2008
2 issues →
XAOCape Archive 2005
X-Men: Age of Apocalypse
2005–2005
2 issues →
WWHCape Archive 2007
World War Hulk: X-Men
2007–2007
2 issues →
XBPCape Archive 2014
X-Factor by Peter David: The Complete Collection
2014–2014
2 issues →
XECCape Archive 2014
X-Men Epic Collection
2014–
2 issues →
XECCape Archive 2017
X-Factor Epic Collection
2017–
2 issues →
DBJCape Archive 2019
Deadpool by Joe Kelly: The Complete Collection
2019–
2 issues →
X-Men Annual
1970–1991
1 issue →
Excalibur
1988–1998
1 issue →
X-Men Classic
1990–1995
1 issue →
Spider-Man
1990–1998
1 issue →
Guardians of the Galaxy
1990–1995
1 issue →
The Official Handbook of the Marvel Universe: Master Edition
1990–1993
1 issue →
MARCape Archive 1991
Marvel Annual Report
1991–1995
1 issue →
X-Men
1991–2001
1 issue →
XASCape Archive 1992
X-Force and Spider-Man: Sabotage
1992–1992
1 issue →
X-Men Unlimited
1993–2003
1 issue →
XSCape Archive 1994
X-Cutioner's Song
1994–1994
1 issue →
XCape Archive 1994
X-Men
1994–1996
1 issue →
XACCape Archive 1995
X-Force and Cable '95
1995–1995
1 issue →
UXCape Archive 1995
Ultimate X-Man
1995–1995
1 issue →
XLQCape Archive 1995
X-Men: Legion Quest
1995–1995
1 issue →
X-Men Prime
1995–1995
1 issue →
Onslaught
1996–1996
1 issue →
XCDCape Archive 1996
X-Men: Clan Destine
1996–1996
1 issue →
XOOCape Archive 1996
X-Men: Origin of Generation X
1996–1996
1 issue →
Youngblood / X-Force
1996–1996
1 issue →
X'Cape Archive 1996
X-Men '96
1996–1996
1 issue →
Essential X-Men
1996–2013
1 issue →
X-Men: Alterniverse Visions
1996–1996
1 issue →
X-Force / Youngblood
1996–1996
1 issue →
C/XCape Archive 1996
Cable / X-Force '96
1996–1996
1 issue →