I'll be updating this as the community grows so that we can track how things are working out. Comment here if you don't see yourself on the list, or that it hasn't been updated to fit your restamp.
Anime characters
Alucard - 0
Integra Hellsing - 4
foggyflowersephiraprincesspaperplacebosallow_carrotSeras Victoria - 2
_mrowrmisselectricityWalter C. Dornez - 0
Fergesson - 0
Helena - 0
Incognito - 0 (let's keep it that way :D)
Manga/OVA characters
Hellsing
Alucard - 1
mouette_lunaireIntegra - 2
paperclipchains_scottishgentrySeras Victoria - 4
goblinbeerose_tenshidarkmignonettepoison_songWalter C. Dornez - 1
graveofdreamsDawn!Walter - 1
nezbitPip Bernadette - 2
draculardarcanetongueArthur Hellsing (The Dawn)- 0
Iscariot
Father Alexander Anderson - 1
grey_athenaEnrico Maxwell - 1
anubismitoHeinkel - 0
Yumie - 0
Yumiko - 0
Millennium
The Major (Montana Max) - 0
Captain (Hans Guensche) - 1
kaosu_futokuteiDok - 1
sk_chanSchroedinger - 3
jdgrl47shadowsfaithn0styleRip Van Winkle - 2
chibi_ryochanbroadwaybabe11Zorin Blitz - 0
Tubalcain Alhambra (The Dandy) - 0
Luke Valentine - 0
Jan Valentine - 0
Other
Sir Penwood - 0
Sir Irons - 0
Father Ronaldo (if he should be in Iscariot, tell me) - 0