The complexity level is mostly about additional mental load. Please note that the levels ONLY give the complexity of the character in terms of surreal play and special mechanics - everything that goes beyond your normal larp character.
1 this is basically your normal, straight forward larp character. Apart from shadow relations and monster, there are no additional complexities. You can play them without much steering or brain yoga and if needed, you can avoid any optional mechanics and play elements completely without compromising the character.
2 this character is mostly normal and straight forward but has a small element of complexity. Their play may be strongly tied to one of the optional mechanics of the larp (e.g. one of the metaspaces or Wayfarer culture), or to special mechanics of other characters, or they may have shadow relations that are more abstract. Still, there will be no mechanics beyond those that apply to all characters.
3 this character has a significant element of complexity that goes beyond the basic larp design and is central to the character. This may be a mechanic unique to the character or to the whole cluster. You might need to put in some additional thought in advance, or may need to transfer some of the information given in workshops to your special case. But all in all, you can still just play the larp in a somewhat normal, straight-forward way.
4 this character has a very high complexity that shapes their whole experience, may come with additional responsibilities and requires a significant amount of steering and/or calibration. They may perceive the larp very differently than others, have a unique mechanic that is central to all of their interactions, or be very meta.
Generally, we’d recommend first time larpers to stick to level 1-2 characters, and we’d only recommend level 4 characters to experienced larpers.