Describing pengenders/penugenders/penegender/paenegenders/paenugenders/paengenders, paragenders, quasi-genders, -jux-/-prox(imal)- genders, perigenders and almogenders. Who are proximal to certain gender in the spectrum.

Based on penultrois/penultimatrois, pen- meaning "almost, nearly", just as in penumbra and peninsula. Alternative words: penutrois, paentrois, paenutrois, paenetrois, penetrois, peritrois, paratrois, pertrois, partrois, proxitrois, pæntrois, pænutrois.

Ultimatrois

Or ultrois. Conoting ultimate genders or gender ultimacy, your final/last gender (previous/prior/recent/subsequent) or its extremity/maximum. Your foremost, furthest gender (innermost/utmost/midmost/topmost), but it's ultimary not citimary/citrois, ulterior(ity) not citerior(ity) [citi-/citer-/citra- is the opposite of ultra-/ulti-/ulter-].

Ultimarity could be an (ant)arity that goes beyond limits or is subsequent/ends somewhere. Uls denotes beyond, just as extr(a)-/exter-.

Mewgender: a mythical and unique gender identity with psychic energy/abilities and an association with genesis [creation/(pen)ultimacy/formation/metaphorical birth/root], related to pokemon mew.

Coined with @identity-help

Penultrois is a penultimate leptrois, this can mean many things, including:

Mimicking you are almost there on discovering your identity;

That you miss a measure on leptive spectrum, this measure can be immaterial or material, numerable or innumerable, infinitive or finite, negatrois or positrois, or other fragments;

A gender that is synonymous to the penultimate, related before or not;

That your identity isn’t the initial but isn’t also the final;

A gender similar to a penultimate phoenix, dying while being alive, paradoxically related to an electric hybrid, which possibly rises from the ashes themselves;

Having another form of leptrois before or not to the last gender of your multiple/plural gender, ie. as a petrification rooted in the path, impotentializing itself, like medusa.

Penultigender: identifying as all genders, within your own culture and life experience, except a specific one. In the case of penultieugender, this specific genderness can be a nongender or an antigender (neutrois or negatrois). Anyway, someone who is penultiantigender would be opposed to all genders except a specific one and this one could be a nongender or an eugender and a penultinongender could monoeugender or monoantigender (monopositrois or mononegatrois). For example, a penultiboy can be described as a pangender antiboy, nonboy polygender or boyless omnigender, similar to (pan)genderfae but not necessarily genderfluid.