Waterproof corner

[ninro]

Can anyone suggest how this corner should be finished to ensure water tightness?
I know the 'new' white corner is cracked but even the bottom arrow exposes a weak point i think.
I know the gap between bottom of fascia and brickwork needs sealing. There's a gap along whole wall. Maybe a pvc quadrant trim here?
Btw this is brand new.

 

[noseall]

The fascia is not deep enough and should have been removed before the lower roof was felted. It's poor detailing and amateurish execution. Little thought and little foresight.
The roofers need bringing back on their horses and given ten lashes.

 

[ninro]

Thanks the bit that vothers me the most is the lowest arrow. When rain hits the top of that brick where does it go. Into the cavity wall, onto the bottom of the roof beams

 

[DiyNutJob]

Find a piece of upcv corner and glue it on? The new piece should extend much further into the felt side.

 

[ninro]

Here's how roofer eventually finished corner.
IMHO not exactly a work of art