Combo this card with "DNA Surgery" and call "Plant", so your opponent cannot attack your monsters.
In a Plant-based deck, use this monster along with "Mystic Tomato" to search it out. Also, "Mystic Tomato" is a Plant-Type, which aids such a deck. In order for "Twilight Rose Knight" to have her secondary effect to Special Summon a Plant type monster she must be a Normal Summon so searching her out in this way will cause her to lose this effect.
A possible combo would be to use this card, "The Tricky" and "Lonefire Blossom". Discard a card to Special Summon "The Tricky", Normal Summon "Twilight Rose Knight", then Special Summon "Lonefire Blossom". Tribute "Lonefire" for "Tytannial", then tune "Twilight Rose" and "The Tricky" for a Level 8 Synchro Monster, giving you two very powerful monsters. "Dandylion" would work well as the discard cost for "The Tricky" because then you get 2 tokens on the field that you can use to fuel "Tytannial's" effect.