The wall you are wanting to remove is not a bearing wall by looking at the framing in the attic and the roof lines of the house.
Removing interior walls with hip roofs.
Interior walls often provide hidden passage for utilities such as hvac heating ventilation and air conditioning electrical wiring and plumbing.
Remember the alignment they generally go from side to side on most modern homes across the width of the house.
These are large pieces of lumber going across the house from side to side supporting the floor roof and are generally 16 apart.
But there are five possible exceptions to look out for.
1 when the home has an l or t shape there may be an interior bearing wall under the intersection of the perpendicular rows of trusses.
Interior walls can also provide load bearing support for the roof system for the floors above or for intermediate support of long spans and splices in the ceiling joists.
Just to be on the side of caution i would install an 8ft 4x4 directly centered under the splice with lag bolts and remove the vertical.
However a house with a hip roof structure suggests that all the exterior walls are bearing walls.
Go into your basement or crawlspace and look at the alignment of floor joists.
First determine if the wall you want to remove is a load bearing wall meaning it supports the floor above.