AVANNA's [h] phoneme is technically usable as an end breath, but you should confine it to a really small note at the end and it's definitely "sharper" than say, Miku English's handling of the phoneme (it can be used after consonants to give them sharper pronunciation, i.e. spelling "get" like [gh e t h], as a pronunciation hack though!). There are some other phonemes that work situationally though, like [w] after [@U] or [u:], [j] after [i:] or [eI], etc.