- Steffi begins the video by mentioning how she is a bit self-conscious and worried about getting her speech right. (probably low Se, valued Ti)
- She describes largely being "in her head", and while she constantly seeks out knowledge, has no interest in applying it. (high Ni, low Te)
- The words "honest" and "authentic" come up repeatedly, especially referring to expressing one's inner emotions, whether they are good or bad (Fe+Ni)
- Says that the values question is "the most important question" — the search for values in particular. Steffi is still young and describes her values as being in flux.
- Has an interest in history and connects her values with the Victorian period and the novels she read from that period. (Ni+Fe)
- Comes across as a soft, accepting kind of person who nevertheless has a certain depth of emotion. (low Se, introversion, ethics)
- Is quite good at articulating her self-observations. (probably high Ni, Ti)
These observations are already enough to point to IEI. In fact it is hard to see Steffi as anything but that type.
Although she is socially introverted (with only a few friends) and tends to keep to herself, Steffi describes being interested in people, and having been more extraverted, expressive, and focused on others as a child. Fe creative types tend vary widely with regards to social extraversion, and Steffi has embodied both of these extremes over the course of her life.
Her being in her mind and general focus on imaginary or past worlds suggests high focus on Ni, and probably ego Ni. She is interested in learning from the history by seeing it with an open mind, without bias. I find IEIs often emphasize the need for open-mindedness.
Despite being focused on people, Steffi has what some might find a shocking disregard for relationships in themselves: she "appreciates people" or "appreciates their existence" (one of a few dramatic phrases found in Steffi's speech) but treats everyone essentially the same, even her parents. This strongly suggests that Steffi values Fe and not Fi, as does her disinterest in "corrective" moral values (or "traits"), as opposed to abstract, conceptual ones like "beauty" and "simplicity". It seems like these values are arrived at through a process of reflection on the world and herself, yet they have little to do with how she actually operates in the world (she explicitly mentions that she didn't actually act on her value of beauty :). Despite considering authenticity and honesty "traits", she doesn't see how one might work on them, they "just are" and she wouldn't judge people very strongly based on them per se.
Difficulty acting and "actually living" in the outside world is another theme that comes up, very common in introverted intuitives, with weak and cautious Se. This is due to the tradeoff between Ni's focus on the internal world and Se's focus on the outside world. Steffi is more capable when it comes to dealing with practical Si details such as grocery shopping etc. In fact Steffi is rather mature for her age and is quite aware of her weaknesses.
Fe, especially as in Beta NFs, is about authentic self-expression. Steffi describes very clearly what this means to her: to show others who you are internally, even if who you are is "bad" (e.g. if you are envious).
Steffi's attitude towards conflict is surprisingly nonchalant: she neither shows a tendency to engage and defend herself (as most Se valuers would), nor does she seem to get bothered by the unpleasantness of the situation (as most Si valuers would). Not many types other than IEI (with suggestive but valued Se) would be likely to express this attitude — perhaps some Ne leadings could. Not taking these things personally could also be attributed to low priority Fi. What she does describe being sensitive to is the need to fulfill expectations. In my opinion this is an example of Ti, related to the theme of duty — she gives the example of selling ice cream and all the expectations placed on her by the customer and her work. She had to focus quite hard to get the change right (something which involves logic, a weak spot which she describes not having any intrinsic inclination towards).
Steffi mentions some far-off dreams for the future ("I have dreams but not goals" (37:24)), but her tendency towards inaction leaves some question as to whether these are things that might actually happen. She describes founding a cafe for discussing philosophy in an intimate, comfortable setting. She has no interest in noisy settings or getting a lot of attention through marketing. She also certainly isn't interested in working with numbers or the competitive aspects of business (Se+Te). These real-world exigencies are far from the mental realm that Steffi tends to inhabit when given the choice.
Some other strengths Steffi describes herself with are: empathetic, adaptable, creative, reflective, receptive. All traits that are reasonably typical of IEIs.