Emma Frost appears in several flashbacks in X-Men #139, but so do the rest of her family (we’re currently missing X 139-FB for the Frosts).
BLACK KING/SEBASTIAN SHAW
X:HC 4 (3-12)-FB
L:SS
X 29-FB
*X 139 (12:1-12:4)-FB
UX 100-FB
PM@ 1-BTS
UX 96-BTS
X:HC 4 (13-16)-FB
XX 41-FB
*X 139 (12:5)-FB
UX 98 (1 - 11)-BTS
…
X:HC 4 (19:2)-FB
*X 139 (12:6-12:7)-FB
UX@2 2-FB
…
FROST, ADRIENNE
…
EF 6
*X 139-FB
*X 139-FB-FB
EF 10
…
FROST, CHRISTIAN
…
EF 6
*X 139 (9:5-10:4)-FB
*X 139-FB-FB-OP
*X 139 (10:5)-FB
FROST, CORDELIA
…
EF 6
*X 139-FB
*X 139-FB-FB
EF 11
…
FROST, HAZEL
…
EF 6
*X 139-FB
*X 139-FB-FB-OP
EF 11
…
FROST, WINSTON
…
EF 6
*X 139-FB
*X 139-FB-FB
EF 10
…
WHITE QUEEN II/EMMA GRACE FROST
…
EF 6
*X 139 (9:5-10:4)-FB
*X 139-FB-FB
EF 7
…
GENX 23-FB
*X 139 (11:5 - 11:6)-FB
X:DG 5/2
*X 139 (12:1-12:4)-FB
*UX@2 2-FB (move from here)
XU2 6 (6:4-6:5)-FB
X:HC 4 (13-16)-FB
XX 41-FB
*X 139 (12:5)-FB
CX 7/2 (1 - 10)
X:HC 4 (17)-FB
CX 7/2 (11 - 12)
X:HC 4 (19:1)-FB
[UX 531-FB]
X:HC 4 (19:2)-FB
*X 139 (12:6-12:7)-FB
*UX@2 2-FB (move to here)
XU2 6 (7:1)-FB
CX 34/2
…
X '01
*X 139 (15:4-15:5)-FB
X '01
…