The visible magnitude of 29 Persei is 5.16 so it is visible from most locations without needing binoculars or a telescope.
B type stars are known for their prominent helium lines that appear in their spectral analysis. 29 Persei is no exception and it was included in the 1926 Astrophysical Journal article titled Radial velocities of 368 helium stars (Frost, E.B., Barrett S.B., and Struve O.)
55 Persei is similar, but not identical to 29 Persei. Of the two, 29 Persei is the larger and hotter. But they are similar enough, and are close enough together in space that we observe them as having very nearly the same brightness and color.
This star was also included in the heluim star article listed above, and both stars are also part of a study done in 1950 called The moving cluster in Perseus (Roman N.G. and Morgan W.W.).
One of these stars is found near the top of the image. This is HD 20344, an A0 type which is a common white or blue-white main sequence star. The star is only magnitude 8.02 which puts it out of visual range for most observers. It it easily seen in most telescopes.
The other moderately bright blue star near 29 Persei is HD 20282. This is also an A0 spectral type and it is similar to HD 20344 in brightness at a magnitude of 7.51. This means it may be visible unaided to some observers from a dark site, but it is very near the edge of human visual perception.
Both HD 20344 and HD 20282 are A type main sequence stars. These two are similarly blue-white colored, and they look a lot like the B type stars in this image do. But the A type stars are clearly less bright, and they also show a little less blue than the brighter B types do.
All four of these of these stars are roughly the same distance from us in space. And from this image, we can see that the two B type stars, 29 and 31 Persei, are clearly brighter and a bit bluer than the two A type stars shown above them. This is consistent with their star classifications since B types are large, hot and blue stars that are more luminous than most other stars except the rare O types.