As of my last update in April 2023, the font "AB Nirvana*" designed by Redfonts may not be widely recognized in mainstream typography repositories or font collections. It's possible that it's a newer creation, a bespoke or custom font tailored for a specific client or project, or perhaps a more niche offering within the design community. Given this, a detailed description would be speculative without direct access to the font itself or specific information provided by Redfonts.

However, let's consider the possible design philosophy and aesthetic attributes it might embody based on the name "AB Nirvana*" and the typical characteristics of fonts designed by boutique studios such as Redfonts. The name "Nirvana" evokes a sense of ultimate peace, enlightenment, or a perfect state, suggesting that the font may strive towards a visual representation of these concepts.

Fonts named with themes of perfection or enlightenment often incorporate elements of balance, simplicity, and clarity. "AB Nirvana*" might feature clean lines and harmonious proportions, aiming for a timeless look that achieves an effortless readability. It might balance modernist simplicity with subtle, organic details, adding character and warmth to prevent it from seeming too sterile or impersonal.

Given the asterisk in "AB Nirvana*," there could be a playful or unconventional aspect to the font, perhaps hinting at a unique feature, alternate characters, or a special version of the font within its family. This could also signify a particular application or variation of the font, such as a stylistic set designed for specific types of text or usage scenarios.

Redfonts, being a possibly boutique or independent font designer or foundry, is likely to imbue "AB Nirvana*" with distinctive personality traits, ensuring it stands out in specific applications, whether in digital mediums, print, branding, or creative projects. The emphasis could be on creating a font that not only serves functional typography needs but also adds a level of aesthetic pleasure and distinctiveness to projects it graces.

Without direct visual examples or design specifications, one can only imagine the exact style of "AB Nirvana*," but it's plausible to expect a font that balances artistic expressiveness with functional utility, designed to meet contemporary typographic trends and needs.