Just to add fuel to the fire, I will add that "" can be problematic. It's a quote in English and in the dawn of time (computer time, that is), programmers figured it would be a good sign to quote strings. This mean "This is a line" will leave out the "" in the string itself. Writing ""This is a line"" will end the string at the second " and cause an error. The way to write the line in a way the computer would understand would be "\"This is a line\"". However it could also be written "「This is a line」". However this only goes for " and this would also be accepted by the computer "“This is a line”".
For easier comparison:
"\"This is a line\""
"「This is a line」"
"“This is a line”"
Next problem is that most VNs use Japanese locale and as such use the shift-jis encoding (or rather Microsoft's codepage 932, which is virtually identical). This mean that not all characters are available. More specifically whatever is used should be available here Microsoft's cp932 page for 0x81 leading byte. Being aimed at Japanese text, they didn't include “”, but row 60, column 05 to 08 looks useful, or at least as close as one can get to what you asked for.
Leaving technical reasons aside, I do actually like the 「」signs. I think they look decent. I just wish they were available with a character width, which didn't provide so much whitespace around them. However they seem to be made to match a default kanji width to make kanji line up vertical. There is nothing we can do about the width, other than making a custom font.