Is there any character like that?

[oshfdk]

I tried to do the same but this time with mimicking the voynich writing. I made the same round vs. pointy variation by accident. This calls the twin letter theory into question

I'm not sure I understand your argument. It is possible to write sloppily and it is possible to write carefully. Without knowing the underlying principle of Voynichese, we can't tell if it's sloppy or just elaborate.