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If we're using the extract, then everyone (except those who already drank it) will get a boost to their stats, and we'll even have two left over. We can sell them if we decide to build a forum. If we're using the elixir, then Stefan, the new girl Mentha, Delhi, Sigurd, and Thorir will get the flower extract. Relhirasa is already doing well, and Ilza and Albert aren't the most combat-ready characters. Especially Ilza. Mironega and the new girl Mentha will definitely get the elixir. I'd like to give the remaining one to Rheinhold, as a character who can immediately learn something useful. Other candidates with immediate benefits are Sigurd and Gunnar, who can take AoE, Stefan (if he decides to go for archer), or Albert (for healing, which I'm not entirely convinced about). Among the long-term characters, Alicia looks good (two chances to dodge or parry). The others either already drank potions for OD, or they don't look like such attractive options until we find some extra OD or build an observatory.