Lenneth’s height data in this article should be considered as a rough data estimate. Her height was derived by observing the scaling difference between her and the environment. This was done by watching this Valkyrie Profile: Lenneth (PS4/PS5) Review by Noisy Pixel on Youtube.
For more specifics, Lenneth’s height was roughly scaled alongside other male and female characters in the video. In that visual estimate, we used 5’10 as the standard average male height for the males and 5’5 as the average for the females (this idea was influenced from another Valkyrie Franchise Height Estimate featuring the Valkyrie Maria from Valkyrie Elysium). However, basing it only on the character scale difference would not give us sufficient data to create a believable conclusion.
At around [3:03] in the Youtube Gameplay video, we can see Lenneth (the Valkyrie) walk around in what looks like a dungeon. The dungeon, for some reason, contains ship helms, and also some large chests. Take note that both the helm and chest size will obviously vary depending on the circumstance, however, it appears that the dimensions of these items can serve as a proof that Lenneth is actually a bit taller compared to the average female height in the franchise.