Thanks for your questions. I think your first one is another new one, never asked here before, so thanks! (It really is cool getting new questions!!) First of all, it is important to understand that in most dioceses, at least if they have Vicars for Religious or Vicars for Consecrated Life and Vocations offices (not all dioceses are large enough or have large enough staffs for these), the bishop is rarely the first one to work with a candidate. In fact, he may only meet the candidate when others are ready to recommend her for profession. At this point the person may have been meeting with chancery personnel for anywhere from 5-10 years. (Some will have met for even longer.) This ordinarily means that a formation team including Religious, priests, canonists, and sometimes now, another c 603 hermit, will mentor the candidate hermit (and the rest of the formation team).
So, when someone is working this way, it may happen that the bishop retires and is replaced by another bishop before the person is ready to be professed. Sometimes bishops in this situation, will leave the final decision for admission to profession of the candidate up to the next bishop. When these kinds of things happen it may appear to those looking on from the outside, that the candidate is not really known to the diocese or to the new bishop when they are professed --- at least if one only looks at the known dates involved: e.g., New bishop on 9/24, first profession of hermit on 11/24). What is true in this is that the diocese has known the candidate for much longer than just 2-3 months, but we may be unaware of this.It is true that the newer bishop will not know the person well (and certainly not as well as the formation team does), but this is simply another reason bishops often ask the hermit to choose a delegate who will serve as representative to the diocese and to the hermit both. Remember that the first bishop also would not know the hermit well, or at least not as well as the Vicar for Religious who has been working with her all those years. Canon 603 requires that one live this vocation under the supervision (or some translations may say direction) of the bishop, but what this supervision consists of is not spelled out. So, for instance, if a person serves as delegate and knows the hermit well, if she has the appropriate expertise to guide her hermit life, and is available to the bishop whenever he wants to check on things or to meet for a conversation, that can be a very satisfactory way of working out the canonical requirement of supervision. One thing I have not mentioned is the fact that the hermit is entrusted with this vocation. She has shown the diocesan personnel how she lives eremitical life and why, and they have come to trust her and what is usually a relatively long history of this.
The bishop does interview the candidate, sometimes several times in the year or so before profession, and he has her Rule of Life and other pertinent documentation and references. In my experience, a bishop trusts those who know the hermit better than he does, especially current and past Vicars, pastors, and spiritual directors, and he also takes the time he can to get to know her better one-on-one as well as through her writing (if she is published). Remember that c 603 is recognized as calling for temporary profession of vows, meaning these vows will ordinarily last for from 3-5 years and can be renewed before admitting the hermit to perpetual profession and consecration. There is ordinarily a great deal of time available to catch errors or problems that need to be worked out. Moreover, during the years, a bishop will come to understand eremitical life better as the hermit herself grows in the vocation and shows him the hows and whys of this; this mutual influence and education is the best way, I think, for a diocese to grow in its understanding of c 603 vocations.In my own situation, there have been five different bishops here, including one interim, since I first petitioned to be admitted to c 603 consecration. There is no doubt that some have been more involved in supervision than others. From things I have heard from other diocesan hermits in other dioceses, this unevenness is not uncommon. At the same time, as I have written recently, the Diocese (Vicars for Religious) and then Bp Vigneron asked me to choose a delegate who would work more closely and more frequently with me than any bishop might be able to. When Bp Vigneron wanted to speak to me about something he contacted Sister Marietta, and he contacted her for her opinion on matters. Supervision need not look like some non-canonical hermits imagine it. Again, canon 603 is flexible and it is up to the diocesan bishop to decide what this term of the canon will mean. So long as he takes his role seriously and cares for the hermit's vocation, he is fulfilling the canon's prescriptions.
Regarding your last question, while this is repetitive, let me say that my main delegate (Director) has been Sister Marietta Fahey, SHF (Sisters of the Holy Family is a Papal Congregation). She has been my delegate from @ 2005 to the present,; more recently, serving as co-Director (Advocate) is Sister Susan Blomstad, OSF. I have mentioned them both before, but here is a bit more about them. Sister Marietta has served in parish CCD work, as Novice director in her congregation, and has been in leadership of her congregation for 10 years as well; she began and ran Holy Family Center, a small retreat center focusing on Adult personal and spiritual growth, has been a licensed educator in PRH and is highly skilled in personal growth work and spiritual direction. I have known Marietta since @1982 when she agreed to be my spiritual director. Sister Susan, formerly a teacher, was Vicar for Religious and Assistant Director of Vocations for the Diocese of Oakland when I began to become a hermit. She then went into retreat work in Malibu (Serra Retreat) and directed this at the Old Mission Santa Barbara. Susan now serves (yet again!) on her province's leadership team (the Franciscan Sisters of Penance and Christian Charity) and as the local minister for their retired Sisters in Santa Maria, CA. The congregation's Generalate is in Rome.