For those who haven’t yet caught on, the characters have all switched from their Hellsing TV series designs and color schemes to their Hellsing Ultimate OVA designs and color schemes. This will cause a bit of confusion as the timeline sorts itself out, but eventually their memories will all be in order.
Pip: Hey, mignonette, your eyes are blue?
Integra: It’s a beautiful night.
Alucard: Yes, it is.
Seras: You’re just noticing this now?
Pip: No! But I thought — weren’t they — I mean — never mind.
Seras (thinking): …Okay, this is a bad time to ask if his eyes have always been that green.