Another addition to the time-honored Snitch - Au Revoir - Reflection engine, at least until the first two rotate out. Expose is a niche mechanic not often used, so it's nice to see something that can take advantage of that.
Similarities can be drawn with Darwin as a relatively cheap, versatile AI that can gain momentum very quickly, but this virtual turtle can gain up to 4 virus counters a turn (more if you import shenanigans like Incubator or Surge.) In addition, Aumakua is 1 to break as opposed to Darwin's 2, making it much more affordable to use. It's also 1 influence, so importing to Anarch isn't a losing proposition.
As mentioned, Aumakua works well hand in hand with Snitch or other expose cards, like Infiltration, Deuces Wild or (not) Raymond Flint. Criminals have a laundry list of expose cards - that is to say, most of the expose cards available - and Aumakua benefits on top of all of those. Silhouette: Stealth Operative is a good fit for our turtley friend, as her ability gives natural exposes along with her runs.
However, exposing is not the only thing Aumakua gains virus counters from. Accessing cards and not stealing or trashing them gives our virtual turtle valuable strength. This means that you gain that counter even if the card you access can't be stolen or trashed. Non-trashable operations and ICE? Virus counter. Trashable operations and ICE? Hey, if you don't want to pay, then virus counter. Put an agenda on Film Critic after accessing it? Virus counter. Asset spam? It's raining virus counters.
The ease with which you can put counters on Aumakua - especially in superwide asset spam decks - is its greatest strength against the Corp's best defence: purging. The way Aumakua works means you can easily recover tempo if your deck is prepared to help it out. Keep expose cards ready to give it the boost it needs. Keep a killer on hand for Swordsman, if anyone even uses that anymore. Keep a decoder, too - I suggest Abagnale - for Turing, but I only say that because I specifically nearly lost a game to Sir Alan. Unless you're teching specifically against it I would save on deck space, though.
Aumakua is a virus, which means it can benefit from MemStrips, Déjà Vu, and the usual complement of Anarch-based virus cards (Hivemind, Virus Breeding Ground and the aforementioned Incubator come to mind). If you're not too tight on influence then consider importing some of these shenanigans to make Aumakua harder, better, faster, stronger o_o
In conclusion, Aumakua is a cool virtual turtle that takes Darwin's strength mechanic and updates it for a new age and a new faction. It has good synergies both in- and cross-faction, and if you're not afraid of AI hate definitely give it a try in your expose-based Criminal decks. Alternatively, have a go at bringing it into Anarch as a low-costed and low-influence AI that benefits a lot from virus-based strategies.