I think by character she means buildings/flats that are not your standard box with low ceiling, flumsy windows and build less than 30 year ago.
That is a "rarity" in HK unfortunately. People tend to prefer, as soon as they have the means, newer flat in newer towers.
I have friends living on a stunning old building on Caine Road/nearby Caine road - about 1.400 sq for less than 40K, the place has high ceiling, old style tiles on the floor....a great great flat, but those are rare on the market.